65_HS1-834228961_62-HQ-83894_Serial_164

[PAGE 1] I I I 62- IHC-83894 I Serials EBF 154 111 I 1111 IH lm EBF 62-HCl-83894-ESF 164 DO NOT DE S.f RO iJ FBI CENTRAL RECORDS CENTER HQ HEADQUARTERS Class Case Sub Vol Serial 0062 83694 164 ONLY 8/11/1274166 I 11 II IHI IM I II IIII III I I ll ll ll lll l~III II I RRPO031XG8 [PAGE 2] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UN1TED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 A IR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to i ghtings of unconventional ai rcraft and unidentified flying objects including the so- called Flying Discs To es tablish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and etter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electrical transmission immedia ely afte sighttngs Supplementary reports should be forwarded as availab by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Di ector of Intelli gence Headquarters United States Air Force Cables will contain the phase Pass to COMGENAMC WRIGHT PATTERSON AFB DAYTON OHIO ATTN MCIAXO RESTRICTED -~89 AF [PAGE 3] RESTRICTED Supplementary written reports prepared on AF Form 112 will be forwarded to the Director of Intelligence Headquarters United States Air Force Commanding General Air Materiel Command is authorized direct contact with major Air Commands overseas and organizations under their control in connection with the development of information on this subject Major Air Commands ZI Reports will be forwarded direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAXO-3 by installations receiv ing information pertaining to the requirements enunciated in Part II Copies of such reports may be supplied the Command Headquarters of the installation concerned A copy of all reports sent to Air Materiel Command in accordance with these instruc tions will be forwarded at the same time to the Director of Intelligence Headquarters United States Air Force Written reports will be submitted on AF Form 112 Commanding General Air Materiel Command is authorized direct contact with major Air Commands ZI and organizations under their control in connection with the d~velop ment of information on this subject Non Air Force Agencies Addressees otqer than those of the United States Air Force are requested to forward reports direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAXO-3 In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General Air Materiel Com mand PART II REQUIREMENTS General Date of sighting Time of sighting zonal by 24 hr clock Where sighted observer position a Ground City town Distance and direction from ci or town road intersection etc From building story yard etc Map coordinates if feasible showing latitude and longitude RESTRICTED [PAGE 4] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of object from observer aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type if any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facilities or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sketch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal oscillating fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 5] RESTRICTED Odor if any Rate of evapo ration Does trail vary with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off in elation to speed 14 Support a Wings Aerodynamic list of fuselage Vertical jet Rotating cylinder or cone Aerostatic lift balloon or dirigible 15 Propulsion a Propeller or et Rot or Aerodynamic vanes flapping or oscillating Katz Mayer effect Visible exhaust or jet openings 16 Control and stability a Fins Stabilizers or izontal or vertical Size Shape Location RESTRICTED [PAGE 6] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P 19 Sound a Continuous whine or buzz Roar whistle whoosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of observer Address Occupation Place of business a Employer or employee Pertinent hobbies a Is observer amateur astronomer pilot engineer etc Length of time engaged in hobby experience AbUity to determine a Color Speed of moving objects Size at distance Reliability of observer a Sources RESTRICTED [PAGE 7] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in general How attention was drawn to object(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne Witnesses a Addressees Occupation Reliability 10 Comments of interrogator regarding the intell1gence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay in the turn and what was its speed Note particularly any separation of distant target into several targets upon approach Track all if possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 8] RESTRICTED Local flight schedules of commercial private and military aircraft flying in vic!nity at the time Check Canadian activity if close to that border Possible releases of testing devices in vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other Jf ob ject contacted earth obtain soil samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils Jf object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radi oactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or original negatives where available if not secure sketches of a Object Surrounding terrain where observed Place wh ere it contacted earth ii this happened Maneuvers Formation ii ob jects were more than two Secure signed statement Obtain fragments or physical evidence where possible 10 Was any radio antenna to be observed i.e any projections or extentlons that might presum ably be construed as such CABELL Major General USAF Director of Intelligence Office of Deputy Chief of Staff Operations DISTRIBUTION Commanding Generals Maj or Air Commands ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence Department of State Director of Intelligence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Direct Federal Bureau of Investigation RESTRICTED [PAGE 9] RESTRICTED RESTRICTED [PAGE 10] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The urp ose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objec ts including the so-called Flying Discs To establlsh procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and lett CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action ar herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as available by th most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports wlll be transmitted to the Director of Intelll gence Headquarters United State:s Air Force Cables will contain th phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0-3 RESTRICTED [PAGE 11] RESTRICTED Supplementary written reports prepared on AF Form 112 will be forwarded to the Director of Intelligence Headquarters United States Air Force Commanding General Air Materiel Command is authorized direct contact with major Air Commands overseas and or ganizations under their control in connection with the development of information on thl.s subj ec Major Air Commands ZI Repo rts wlll be forwa rd ed direct to the Co mmanding Gene ra Al.r Mate ri el Command Wrigh Patterson Al.r Fo rc Base Dayton Ohio Attn MCIAXO-3 by installations ece iv ing lnformation pertaining to the requ ir ements enunciated in Part II Copies of such eports ma be supp li ed the Command Headquarters of the installation conce rn ed A copy of all eports sent to Air Materiel Command in acco rda nce with these instruc tions wlll be forwarded at the same ti.me to the Direc tor of Intelligence Headquarters United States Air Force Written epo rt will be submitted on AF Fo rm 112 Commanding General Air Mate ri el Command is authorized direct contact with major Air Commands ZI and or ganizations under thel.r con tr ol in connection wl.th the develop ment of info rm ation on this subject Non-Air Force Agencies Addr essees ot Qe than those of the United States Air Fo rc are equested to fo rward epo rts dir ect to the Commanding General Al.r Materiel Command Wright- Pa tt er son Air Force Base Dayton Ohio Attn MCIAXO-3 In rder to educe the ti.m factor involved in tr a nsmissi on of this type of information it is equ es ted that wh er ever communications facilities permit subordinate el eme nts be authorized to communicate reports dir ect to the Commanding General Air Materiel Com mand PART Il REQUIREMENTS General Date of sighting Time of sighting onal by 24 hr clock Wh er sig hted bserv r's position a Ground City to wn Distance and direction from city or own road intersection etc Fr om building story ard etc Map coo rd inates lf feasible showing latitude and longitude RESTRICTED [PAGE 12] RESTRIC:t'ED Air Type aircraft speed altltude direction of flight Distance and direction rom city town or known landmark Clock position of object from observe r's aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type l.f any sketch l.f possible Observable celestial phenomena or planets that may account for the slghtlng Local fac111t!.es or rganiz ations which follow such celestial phenomena should be consulted for such information Distance of object from observe a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sketch ti possible Apparent construction Of what material or substance Size Estimated size Size as Lt appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal osctllatlng fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 13] RESTRICTED Odor if any Ra te of evaporatlon Does tr ail vary with sound spur 12 Effect on clouds a Opened path thru clouds Fo rced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off in lati on speed 14 Support a Wings Aer odynamic list of fuselage Ve rtical jet Ro ta ti ng cylinder or cone Aerostatic lift balloon or dirig ib le 15 Propulsion a Propeller or jet Rotor Aer ody namlc van es flapping or osclllating Katz Mayer effect Visible exhaust or jet openings 16 Co ntr ol artd stability a Fins Stablll.zers or izontal or vertical Size Shape Location RESTRIC ED [PAGE 14] RESTRICTED 17 Al.r ducts a Slots Duct openings 18 Speed 19 Sound a Continuous wblne or bu zz Roa whistle whoosh Interml.ttent 20 Manner of disappearance a Explode Possl.bill.ty of fragments Other physl cal evldence Faded from vl isap pea ed behlnd bs acl Relative to the Observer Name of ob se rv er Addr ess Occupation Place of busine ss a Employer or employee Pertinent hobbl es a Is observer amateur astronomer pllot enginee tc Length of tim engaged in hobby experience Abllity to determine a Color Speed of movl.ng objects Size at distance ReUabll1 ty of bserv a Sources REST RICTED [PAGE 15] RESTRICTED Neighbors Police Dept FBI rec rd Employer Notes re la tive to observer on a Sightings in general How att en ti on was drawn to object(s Sound Motion Glint of llght Degree of fatigue and duratlon of flight at time of sighting in cases where observer ls airborne Witness es a Addressees Occupation Reliabllity 10 Comments of interr ogator regarding the intelligence and character of person interrogated Relative to Radar Sightings Re radars operating on gr ound a bs ervations of range speed altitude and size of target Did targ et executive any turns If so what angle 180° etc and what radius of tu rn If radius of turn not observable how long did the target stay in th turn and what was its speed Note particularly any separation of distant target into several targets upon approach Track all if possible If airborne when object sighted a Wer there any radar inductions or ext ra noise on radi circuits Give estima tes of size speed maneuve rs etc GENERAL Teletype sequences of local eat her condltl.ons Winds aloft epo rt RESTRICTED [PAGE 16] RESTRICTED Local fUght schedules of commercial private and m1litary aircraft flying in vicinity at the time Check Canadian activ1ty close to that border Possible releases of testing devices ln vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of sons If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters or possible radioactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or riginal negatives where available if not secure sketches of a Object Surrounding terrain where observed Place wh ere it contacted earth if this happened Maneuvers Formation if objects were more than two Secure signed statement Obtain fragments or physical evidence where possible 10 Was any radi antenna to be observed any projections or extentions that might presum ably be construed as such CABELL Major General USAF Director of Intelligence Offlce of Deputy Chtef of Staff Ope rations DISTRlBUTION Commanding Generals Major Air Commands ZI and Overseas All United States Air Attaches Director of Central Intelligence Speci al Assistant for Research and Intelllgence Department of State Director of Intelligence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Director I Federal Bu eau of Investigation RESTRICTED [PAGE 17] RESTRICTED RESTRICTED [PAGE 18] RESTRICTED DEPARTMENI OF THE Affi FORCE HEADQUARTERS UNITED STATES Am FORCE DmECTORATE OF INI'ELLIGENCE WASHINGTON 25 15 February 1949 Am INTELLIGENCE REQUIBEMENI'S MEMORANDUM NUMBER UNCONVENTIONAL Arn.CRAFT PART I GENERAL PURPOSE The purpose of this memorandum ls twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraf and un1dent1f1ed flying objects including the so-called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be proc ur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as available by the most expeditlous means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Ini ti al and supplementary cabled reports will be transmitted to the Director of Intem gence Headquarters United State:s Air Force Cables will contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0-3 RESTRICTED [PAGE 19] RESTRICTED Supplementary wr itten reports prepared on AF Form 112 wlll be forwarded to the Director of Intelllgence Headquarters United States Air Force Commanding General Air Materiel Command is authorized direct cont act with major Al.r Commands over seas and organizations under their control in connection with the development of i nf ormation on this subject Major Air Commands Reports will be or arded direct to the Commanding General Air Mate ri el Command Wright-Patterson Air Force Base Dayt on Ohio Attn MCIAXO-3 by l.nstallations ece iv ing information pertaining to the requirements enunciated in Pa rt TI Copies of such rep orts may be supplied the Command Headquarters of the installation conce rn ed A copy of all epo rt sen Air Materiel Command in acco rdan ce with these instruc tions will be forwarded at the same time to the lr ector of Intelligence Headquarters United Stat es Air Force Written epo rt wlll be subm itt ed on AF Form 112 Commanding General Al.r Materiel Command is authorized direct contact with major Air Commands I and rg an i za tions under their control in connection with the develop ment of information on this subjec Non-Air Force Agencies Addr essees otQe than th ose of the United states Air Fo rce ar equested to fo rward rep rts direct to the Commanding General Air Materiel Command Wright- Pa tt er son Air Force Base Dayton Ohio Attn MCIAXO-3 In order to educe the time factor involved in tran sm issi on of this type of information it ts equested that wh er ever communications facillties permit subordinate eleme nts be au tho riz ed to communicate epo rts direct to the Commanding General Air Mat ri el Com mand PART II REQUIREMENTS General Date of si ghting Time of sighting zonal by 24 hr clock Where sighted ob se rver position a Ground City to wn Distance and direction from ci ty or town oad intersection etc From building story ard etc Map coordinates if feasible showing latitude and l~ngitude RESTRICTED [PAGE 20] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of object from observe r's aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of ob jects Formation type if any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facilities or orga nizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of eleva ti on from horizon Altitude Time in sight Appearance of object a Color Shape Sk etch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from observer view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal osclllating fluttering evasive aggr essive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 21] RESTRICTED Odor if any Rate of evaporation Does trail vary with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or is ts Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off Ln elation to speed 14 Support a Wings Aerodynamic list of fuselage Ve rti cal jet Rotating cylinder or cone Aer ostatic li ft balloon or dir igible 15 Propulsion a opeller or jet Roto Aerodynamic vanes flapping or oscillating Katz Mayer effect Visible exhaust or jet openings 16 Control and stability a Fins StabiUzers or izontal or vertical Size Shape Location RESTRICTED [PAGE 22] RESTRICTED 17 Alr ducts a Slots Duct openlngs 18 Speed M.P.H 19 Sound a Continuous whlne or buzz Roar whlstle wl;loosh Intermittent 20 Manner of disappearance a Explode PosslbHlty of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of observer Addr ess Occupation Place of business a Empl oyer or emp loyee Pertinent hobbi es a Is observer amateur astronomer pilot enginee etc Length of time engaged ln hobby experience Ablllty to determine a Color Speed of moving objects Size at distance Rell.abllity of observer a Sources RESTRICTED [PAGE 23] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in general How attention was drawn to ob1ect(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne Witnesses a Addressees Occupation Reliability 10 Comments of interrogator regarding the intelHgence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observatlons of range speed altitude and size of target Did target executive any turns If so what arlgle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay the turn and what was its speed Note particularly any separation of distant target into several targets upon approach Track all if possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 24] RESTR I CTED Local flight schedules of commercial private and m111tary aircraft flying in vicinity at the time Check Canadian activity if close to that border Possible releases of testing devices in vicinity sent aloft by Ordnance Navy Alr Force Army Weather Units Research Organizations or any other If object contacted earth obtain sou samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of sol.ls If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or original negatives where available if not secure sketches of a Object Surrounding terrain where observed Place where it contacted earth if this happened Maneuvers Formation if objects were more than two Secure signed statement Obtain fragments or physical evidence where possible 10 Was any radio antenna to be observed l..e any projections or extentlons that mlght presum ably be construed as such cl CABELL Major General USAF Director of Intelligence Office of Deputy Chief of Staff Operations DISTRIBUTION Commanding Generals Major Air Commands ZI and Overseas All United States Air Attaches Dir ector of Central Intelligence Speci al A ssistant for Research and IntelUgence Department of State Director of Intelligence GSUSA Ch ief of Naval Intelligence Commandant INT United States Coast Guard Director Federal Bureau of Investlgatlon RESTRIC TED [PAGE 25] RESTRICTED RESTRICTED [PAGE 26] RESTRICTED DEPARTMENT OF THE Affi FORCE HEADQUARTERS UNITED STATES AIR FORCE DlRECTORATE OF INTELLIGENCE WASHINGTON 25 16 Feb uary 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AJRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects including the so-called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transfe red to Air Force agencies for action a herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary eports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports wlll be transmitted to the Dir ector of Intelli gence Headquarters United Stat e:s Air Force Cables will contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0- RESTRICTED C9-H92 AF [PAGE 27] RESTRICTED Supplementary written reports prepared on AF Form 112 will be forwarded to the Director of Intelll.gence Headqua rt er Unlted States Alr Force Commandlng General Air Materiel Com mand is au th orized direct contact with major Alr Commands overseas and or ganizations under th el co ntr ol in connection with th development of information on this subject Major Air Commands ZI Reports will be fo rward ed dlrect to th Commanding Ge nera Air Mate ri el Command Wright-Patter so Air Force Base Dayton Ohio Attn MCIAX by installatlons ece iv ing information pertaining to the requir em en ts enunciated ln art II Coples of such epo rts may be supplied th Command Headquarters of th installation concerned A copy of all rep rts sent to Air Mate riel Command in accordance with these instruc ti ons will be forwarded at th same time to th irect or of Intelllgence Headqua rter United States Air Force Written ports will be submitted on AF Fo rm 112 Commandlng Gener al Air Materiel Command is authorized direct con tact with major Air Commands ZI and or ganizations under their control in connection with th develo ment of information on this subject Non-Air Force Agencies Addr essees tQ er than those of the Unit ed States Air Force are eq es ted to fo rward ports direct to the Commanding General Air Materiel Command Wright-Patterson Air Fo rce Base Dayton Oh io Attn MCIAXO-3 In rder to reduce the tim fact or involved ln transmissi on of this type of info rmati on it is equested that wher ever communications acilltles pe rmi subordinate elements be authorized to communicate epo rts dir ct to the Commanding General Air Mate riel Com mand PART II REQUIREMENTS General Date of sighting Time of sighting zonal by 24 hr cl ock Where sighted obse rver posltion a Ground City to wn Distance and direction from city or town road lnter sec on tc From building story yard et Map coordinates if feasib le showing latitude and longitude RESTRICTED [PAGE 28] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of object from observer aircraft Latitude and longitude Sea Latitude and longitude Proxlmity to land Name city country etc Number of objects Formation type if any sketch possible Observable celestial phenomena or planets that may account for the lghtlng Local acillties or organ izati ons which follow such celestial phenomena should be consulted for such information Distance of object fr om observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sketch if possible Apparent construction Of what material or substance Size Estimated size Size as Lt appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal osclllatlng flutterlng evasive aggressive rr atic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 29] RESTRICTED Odor if any Rate of evaporation Does trail vary wlth sound spurts 12 Effect on clouds a Opened pa th thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off in relation to speed 14 Support a Wings Aer odynamic 11st of fuse lage Vertical je Rota ti ng cy inder or cone Aer ost atic lift balloon or dir igible 15 opulslon a opeller or et Rot or Ae rodynamlc vanes flapping or osclilating Katz Mayer effect Visible eXhaust or jet openi ngs 16 Co ntr ol and sta ili ty a Fins Stabilizers horizontal or vertical Size Shape Location RESTRICTED [PAGE 30] RESTRICTED 17 Air ducts a Slots Duct opening 18 Speed M.P.H 19 Sound a Continuous whine or buzz Roar wh istle whoosh Inte rmitt ent 20 Manner of disappearance a Explode Poss ibility of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of observer Addr ess Occupation la ce of business a Employer or employee Pertinent hobbi es a Is ob se rv er amateur astronome pilot enginee etc Length of tim engaged in hobby experience Ability to determine a Color Speed of moving obj ects Size at distance Reliability of observe a Sources RESTRICTED [PAGE 31] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to obser ver on a Sightings in general How attention was drawn to object{s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting ln cases where observer ls airborne Witnesses a Addressees Occupation Reliability 10 Comments of interrogator regarding the intelligence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180 etc and what radius of turn If radius of turn ls not observable how long did the target stay in th turn and what as its speed Note particula rly any separation of distant target into several targets upon approach Track all possible If airborne when object sighted a Were there any adar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft eport RESTRICTED [PAGE 32] RESTRICTED Local flight schedules of commerc1al private and m1Utary aircraft flying ln viclnity at the time Check Canadian activity if close to that border Possible releases of testlng devices in vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If obj ect contacted earth obtain son samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or riginal negatives where available if not secure sketches of a Object Surrounding terraln where observed Place wh ere contacted earth if this happened Maneuvers Formation if objects were more than two Secure signed statement Obtain fragments or physical evidence where poss ibl 10 Was any radi antenna to be observed i.e any projections or extentlons that might presum ably be construed as such cl- CABELL Major General USAF Director of Int ellige nce Office of Deputy Chief of Staff Ope rati ons DISTRJBUTION Commanding Generals Major Air Commands ZI and Overseas All United St ates Air Attaches Director of Central Intelligence Speci al Ass i stant for Research and Intelllgence Department of State Dir ecto of Intelllgence GS USA Chief of Naval Intelligence Commandant INT United States Coast Guard Director Federal Bureau of Investigation RESTRICTED [PAGE 33] RESTRICTED RESTRICTED [PAGE 34] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 Am INTELLIGENCE REQUIB.EMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to ightings of unconventional aircraft and unidentified flying objects including the so -called Flying Discs To es tabli sh procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enWlCiated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Director of IntelU gence Headquarters United States Air Force Cables wm contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0- RESTRICTED C9-'892,AF [PAGE 35] RESTRICTED Supplementa ry writt en reports pr epared on AF Form 112 will be forwarded to the Director of Intelligence Headquarters United States Alr Fo ce Commandlng General Alr Materiel Command ls aut horized direct cont act with major Air Commands over seas and organ i za ti ons under their control in connection with the development of information on this subject Major Air Commands ZI Repo rts wlll be forwarded dir ect to the Co mm anding General Air Materiel Command Wr ight- Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 by Installations ec ei ing information pertaining to the equir emen ts enunciated in Part II Copies of such epo rt may be supplied th Command Headqu arters of th installati on concerned A copy of all eports se nt Air Materiel Command in accordance with hese instruc ti ons wtll be forwarded at the same time the Director of Intelligence Headquarters United stat es Air Force Written epo rts wm be submitted on AF Form 112 Commanding General Air Materiel Command ls authorized direct contact with major Air Commands ZI and or gan iz a ti ons under their con tr ol in connection with the develop ment of info rmati on on this subject Non-Air Force Ag encies Add essees ot.cye than those of the Unit ed states Air Fo ce are equ este to fo rward repo ts direct to th Commanding Gene ral Air Materiel Command Wright- Patterson Air Force Base Dayton Oh io Attn MCIAX0-3 In order to reduc th time factor involved in transmission of thi type of information it is equ es ted that wh er ever communications faciUties permit subordinate elements be authorized to communicate epo rts direct th Commanding General A ir Materiel Com mand PART IT REQUIREMENTS General Date of sighting Time of sighting zonal by 24 hr clock Where sighted bs rver pos iti on a Ground City to wn Dis tan ce and direction fr om city or town oad inter section etc From building sto ry yard etc Map coo rd inates if feasible showing latitude and longitud RESTRICTED [PAGE 36] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of obj ect from observe r's aircraft Latitude and longitude Sea Latitude and longitude Proxlmity to land Name city country etc Number of obj ects Formation type If any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facilities or rganiz ations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of objec a Color Shape Sketch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from observer's view Compared to known object Direction of fllght 10 Tactics or maneuvers Vertical ascent or descent horizontal oscillating fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 37] RESTRICTED Odo if any Rate of evaporation Does trall vary with soun spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off ln lation to speed 14 Support a Wings Aerodynamic Hst of fuselage Vertical et Rotating cylinder or cone Aer os tatic 11.ft balloon or dirigible 15 Propulsion a ope ll er or je Rotor Aer odynamic vanes flapping or osc1llat1ng Katz Mayer effect Visible exhaust or jet openings 16 Co ntrol and st abHity a Fins Stabil!.zers rizontal or ve rtical Size Shape Location RESTRICTED [PAGE 38] RESTR I CTED 17 Air ducts a Slots Duct openings 18 Speed M.P.H 19 Sound a Continuous whine or buzz Roar whi stle w};loosh Intermittent 20 Manner of disappearance a Explode Poss1b1Uty of fragments Other physical evidence Faded from view Disappeared behind obstacle Relattve to the Observer Name of observer Addr ess Occupation Place of business a Employer or employee Pertinent hobbies a Is observer amateur astronomer pilot enginee etc Length of time engaged in hobby experience Ability to determine a Color Speed of moving obj ects Size at distance Reliablllty of observer a Sources RESTRICTED [PAGE 39] RESTRICTED Neighbors Pollce Dept FBI rec rds Employer No tes relative to observer on a Sightings in gener al How attention was drawn to object(s Sound Moti on Glint of light Degree of fatigue and duration of flight at time of sighting in cases here observer is airborne Witnesses a Addr essees Occupation Rellablllty 10 Comments of interrogator ega rding the lntelllgence and character of per son interrogated Relative to Radar Sightings Re radars operating on ground a Observations of rang speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay ln the turn and what was i ts speed Note particularly any separation of distant target into several targets upon approach Tr ack all l.f possible If airb orne when object sighted a Were there any radar inductions or xtra noise on radi circuits Give estimates of size speed maneuvers etc GENERAL Tel etype sequences of local weather conditions Winds aloft eport RESTRICTED [PAGE 40] RESTRICTED Local fllght schedules of commercial private and mll1tary aircraft flying in vidnlty at the ime Check Canadian activity l.f close to that border Possible releases of testing devices in vlcinlty sent aloft by Ordnance Navy Air Force A rmy Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils If object came sufficiently near other aircraft or known objects check surfaces with Gelger counters for possible radioactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or original negatives where available if not secure sketches of a Object Surrounding terrain where observed Place wher contacted earth if this happened Maneuvers Formation if objects were more than two Secure igned statement Obtain fragments or physical evidence where possible 10 Was any radio antenna to be observed Le any projections or extentlons that might pr esum ably be construed as such e>:P CABELL Major General USAF Dlrector of Intelligence Office of Deputy Chief of Staff Operations IS Rl BUTION Commanding Generals Major Air Commands ZI and Overseas All Unit ed States Air Attaches ir ector of Central lntelllgence Sp ecial A ss istant for Research and Intelligence Department of State Directo of Intelligence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Directo Federal Bureau of Invest1gatlon RESTRICTED [PAGE 41] RESTRICTED RESTRICTED [PAGE 42] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpos of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertalning to sightings of unconventional aircraft and unidentified flying bjects including the so-called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith supe rseded REPORTING a General As complete an answer to th requirements enunciated Part II as may be procu able should be dispatched by me ans of electrical transmission immediately after sightings Supplementary reports should be fo rwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Director of Intelll gence Headquarters United Stat Air Force Cables wl.11 contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0- RESTRICTED [PAGE 43] RESTRICTED Supplementary wrltt en reports prepared on AF Fo 112 will be forwarded to th Director of Intelligence Headquarters United States Air Force Commanding General A ir Materiel Command ls authorized direct contact with major Air Commands over seas and rgani zations under their control in connection with the development of information on this sub ject Major Air Commands ZI Reports wm be forwarded direct to the Commanding General Air Materiel Command Wri gh Patte rs on Air Force Base Dayto Ohio Attn MCIAXO-3 by installations ece iv ing info rm a ti on pertaining to th requirements enunciated in Par II Copies of such repo rts may be supplied the Command Headquarte rs of th installation concerned A copy of all epo rts sent to Air Mate ri el Command in a cc rdance with these instruc tions wm be fo rward ed at th sa me time to the irect or of Intelligence Headquarters United Stat es Air Force Written epo rts will be submitted on AF Form 112 Commanding Gener al Air Materiel Command is authorized direct contact with major Air Commands ZI and or gan izati ons under th ir control in connection with the develo ment of info rmati on on this ubj ec Non-Air Force Agenci es Addr essees t~er than those of the United States Air Force are requested to forward reports direct to the Commanding General Air Materiel Command Wright- Pa tter son Air rce Base Dayton hi Attn MCIAXO In order to reduce the time factor involved in transmission of this type of information it equested that wh ereve communications ac iliti es permit subordinate elements be authorized to communicate rep rts direct to th Commanding General Air Mate ri el Com mand PART II REQUIB.EMENTS General Date of ighting Time of sightl.ng onal by 24 hr clock Where sighted bserv er pos iti on a Ground City town Distance and direction from city or town ro ad intersection tc Fr om building sto ry yard et Map coordinates if feasible showing lat itude and longitude RESTRICTED [PAGE 44] RESTRICTED Air Type aircraft speed altitude direction of fllght Distance and direction fr om city town or known landmark Clock position of object from observer's aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type if any sketch if possible Observable celestial phenomena or planets that may account for the slghtlng Local fac1lities or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight A ppearance of object a Color Shape Sketch possible Apparent construction Of what material or substance Size Estimated size Slze as it appeared from observer's vlew Compared to known obj ect Direction of fUght 10 Tactics or maneuvers Vertical ascent or descent horizontal oscillatlng fluttering evasive aggressive er ratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 45] RESTRICTED Odor if any Rate of evaporation Does trail vary with som1d spurts 12 Eff ec on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Llghts a Reflected or attached Luminous Blinked on and off in relation to speed 14 Support a Wlngs Aer odynamic Ust of fuselage Vertical Jet Rotating cyllnder or cone Aeros atic lift balloon or dir igible 15 Propulsion a ropeller or je Roto Aer odynamic vanes flapping or oscillating Katz Mayer effect Visible exhaust or jet openings 18 Control and stability a Flns Stabilizers ho izontal or ve rtical Size Shape Location RESTRICTED [PAGE 46] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed P.H 19 Sound a Continuous whine or buzz Roar whistle whoosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of bserver Ad dr ess Occupation Place of busine ss a Employer or employee Pe tinent hobbies a Is ob serve amateur astronomer pl.lot engineer etc Length of time engaged in hobby expe ri ence Abllity to determine a Colo Speed of moving objects Size at distanc Reliability of observer a Sources RESTRICTE [PAGE 47] RESTRICTED Neighbors Police Dept FBI records Employe Notes relative to observer on a Sightings general How attention was drawn to obj ect(s Sound Motion Glint of light Degree of fatigue and duration of flight at tlme of sightlng in cases where ob serve is airborne Witnesses a Addressees Occupation Reliability 10 Comments of interrogator regarding the intelUgence and character of person inter ogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what adius of turn If radius of turn is not observable how long did the target stay in the turn and what was its speed Note particularly any separation of distant target into several targets upon appr oach Track all if possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of slze speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 48] RESTRICTED Local night schedules of commercial private and m111tary aircraft flying vicinity at the time Check Canadian activity close to that border Possible releases of esting devic es vicinity sent aloft by rdn ance Navy Alr Force Army Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity Make comparis ons with other unaffected aircraft objects etc Obtain photographs or original negatives wh ere available if not secure sketches of a Ob je ct Surroundlng terrain where observed Place wh ere it contacted earth if this happened Maneuvers Fo rmaU on if bjects wer more than tw Secure signed statement Obtain fragments or physical evidence where possible 10 Was any radi antenna to be observed i.e any pr ojections or extentions that might presum ably be construed as such CABELL Major General USAF Director of lntell1gence Office of Deputy Chief of Staff Ope rations DISTRIBUTION Commanding Generals Major Air Commands ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence Department of State Director of Int elligence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Director Federal Bureau of Investigation RESTRICTED [PAGE 49] RESTRICTED RESTRICTED [PAGE 50] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of thls memorandum Is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects lncludlng the so-called Flying Discs 11 To establish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January Hl48 and letter CSGID 425 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary r·eports should be forwarded as available by the most expeditious means consistent with the importance of the Information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Director of Intelll gence Headquarters United Statc,s Air Force Cables will contaln the phase Pass to COMGENAMC WRIGHT- PATTERSON AFB DAYTON OHIO ATTN MClAX0-3 RESTRICTED [PAGE 51] RESTRICTED Supplementary writt en eports prepared on AF Form 112 will be fo rward ed to the Direc tor of Intelligence Headquarters United St ates Air Force Commanding General Air Materiel Command is autho ri zed direct con tact wlth major Air Commands overseas and or ganizations under their contr ol in connection wlth the development of inf orma ti on on this subj ect Major Air Commands I Reports wm be for warded dir ect to th Co mmanding Gener a Air Materiel Command Wright-Patte rs on Air Force Base Da yt on Ohio Attn MCIAX by installations rec ei ing information pe rt aining to th quir emen ts enunciated in Pa rt Il Copi es of such epo rts may be supplied the Command Headquarters of th inst alla tion concerned A copy of all reports sent to Air Mate ri el Command In ac cor dance with these instruc ti ons will be fo rward ed at the same time to the Director of Intelligence Headquarters United Stat es Air Force Written rep rt will be submitted on AF Form 11 Commanding Gener al Air Materiel Command is authorized dir ect contact with major Air Commands I and or gan izati ons unde their control in connection with the develop ment of info rmati on on thls subject Non-Air Force Ag enc ies Addr essees t~er than th ose of the United States Air Force are request ed to forward epo rts direct to th Commanding Gene ral Air Materiel Command Wright-Patter son Air Force Base Dayton Ohio Attn MCIAXO In order to reduce the tim fact or involved in transmissi on of thi type of info rmation it is eques ted that wh rev er comm unications facUlties pe rmit subordinate elements be author iz ed to communicate rep rts direct to the Commanding Ge neral Air Materiel Com mand PART ll REQUffiEMENTS General Date of sighting Time of sighting zonal by 24 hr clock Where sighted bs rv pos iti on a Ground City town Distance and direction fr om city or town road intersection etc From bullding story ar tc Map coor dinates if feasible showing latitude and longitude RESTRICTED [PAGE 52] RESTRICTED Al.r Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of object from observer aircraft Lati tude and longitude Sea Latitude and longitude Proximity to land Name clty country etc Number of objects Formation type if any sketch If poss ibl Observable celestial phenomena or planets that may account for the sighting Local facilities or rg anizations which follow such celestial phenomena should be consulted for ch information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sk etch if possible Apparent construction Of what material or substance Size Estimated size Size as l.t appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal oscillating fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 53] RESTRICTED Odor if any Rate of evapor a ti on Does trail vary with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cl ud 13 Lights a Reflected or attached Luminous Blinked on and off in elation to speed 14 Support a Wings Aerodynamic list of fuselage Ve rtical jet Rotating cylinder or cone Aerostatic 11ft balloon or dirigible 15 Propulsion a Pr ope ll er or jet Ro to Aerodynamic vanes flapping or osc illating Katz Mayer ff ec Visible exhaust or jet openings 16 Co ntr ol and stablll.ty a Fins Stabillzers riz on tal or ve rti cal Size Shape Locatlon RESTRICTED [PAGE 54] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed 19 Sound a Continuous whine or buzz Roar whistle w}:loosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behlnd obstacle Relative to the Observer Name of observer Address Occupation Place of business a Employer or employee Pertinent hobbles a Is observer amateur astronomer pilot engineer etc Length of time engaged in bobby experience Ablllty to determine a Color Speed of moving objects Size at distance Reliability of bserv a Sources RESTRICTED [PAGE 55] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in general How attention was drawn to object(s Sound Motion Glint of Ught Degree of fatigue and duration of flight at time of sighting in cases where obse rver is airborne Witnesses a Addressees Occupation ReliabiUty 10 Comments of interrogator regarding the intelUgence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target D1d target executive any turns If so what angle 180° etc and what radius of turn If radius of turn not observable how long did the target stay in the turn and what was its speed Note particularly any separation of distant target into several targets upon approach Track all if possible I.f airborne when object sighted a Were there any radar inductions or extra noise on radio circu its Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 56] RESTRICTED Local flight schedules of commercial private and military aircraft flying viclnlty at the tim Check Canadian actlvlty close to that border Possible releases of testing devices in vicinlty sent aloft by Ordnanc Navy Air Fo ce Army Weather Units Research Organizations or any ot her If object contacted earth obtain soil samples within and without depression or spot where bje ct landed and then presumably departed for purpose of making comparison of solls If object came sufflclently near other aircraft or known bjects check surfaces with Gelger counters for possible radi oactivity Make comparisons wlth other unaffected aircraft obj ects et Obtain photographs or rigin al negatives wh er available Ii not sec ur sketches of a Object Surrounding terrain where obse rv ed Place wher it contacted earth lf this happened Maneuver Fo rmation lf bjects wer more than two Secure signed statement Obtain fragments or physical ev idence where possible 10 Was any radi antenna to be observed Le any projections or extentlons that might presum ably be construed as such CABELL Major General USAF Director of Intelllgence Office of Deputy Chief of Staff Operations DISTRIBUTION Commanding Generals Maj or Air Commands ZI and Overseas All United States Air Attaches ir ector of Central Intelligence Special Assistant for Research and Intelligence Department of State Dir ec tor of Intelligenc GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Director Federal Bureau of Investigation RESTRICTED [PAGE 57] RESTRICTED RESTRICTED [PAGE 58] RESTRICTED DEPARTMENT OF THE Affi ORCE HEADQUARTERS UNITED STATES AIR FORCE DffiECTORATE OF INTELLIGENCE WASHINGTON 25 15 Feb uary 1949 Affi INTELLIGENCE REQUIB.EMENTS MEM ORANDUM NUMBER UNCONVENTIONAL AffiCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate contlnulng Air Force equirements for info rm ation pertaining sightings of unconventional aircraft and unidentified flying objec ts including the so -called Flying Dlscs To establish procedures for reporting suc information RESCISSION Department of th Army Collection Memorandum Number dated 21 Janu ar 1948 and le tt CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred Air Force agencies for action ar herewith super seded REP ORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electr i cal transmissi on imme dia tely after sightings Supplementa ry reports should be for warded as available by the consistent with the importance of the lnfo rm a ti on epo rt ed ost expeditio us means Major Air Commands Ov er seas and Air Attach es Initial and supplementary cabled epor ts will be transmitted to the Director of Intem gence Headquarters United St at<::s Air Fo rc Cabl es will contain th phase Pass to COMGENAMC WRIGHT- PATTERSON AFB DAYTON OHIO ATTN MCIAXO-3 RESTRICTED IIH AF [PAGE 59] RESTRICTED Supplementary writt en reports prepared on AF Form 112 will be forwarded to the Director of Intelligence Headquarters United States Air Force Commanding General Air Materiel Command is authorized direct contact with major Air Commands overseas and organizations under their control in connection with the development of information on this subject Major Air Commands ZI Reports w111 be forwarded direct to the Commanding General Air Materiel Command Wright-Patters on Air Force Base Dayton Ohio Attn MCIAX0-3 by installations receiv ing Information pertaining to the requirements enunciated in Part II Coples of such reports may be supplled the Command Headquarters of the Installation concerned A copy of all reports sent to Air Materiel Command in accordance with these Instruc tions wlll be forwarded at the same time to the Director of Intelligence Headquarters United States Air Force Written epo rt will be submitted on AF Form 112 Commanding General Air Materiel Command ls authorized direct contact with major Air Commands I and or ganizations under their control in connection with the develop ment of information on this subject Non-Air Force Agencies Addressees o~er than those of the United States Air Force are requested to forward reports direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 In order to reduce the time factor involved in transmission of this type of information is requested that wherever communications fac1litles permit subordinate elements be authorized to communicate reports direct to the Commanding General Air Materiel Com mand PART Il REQUIREMENTS General Date of sighting Time of sighting zonal by 24 hr clock Where sighted observer's position a Ground City town Distance and dir ec ti on from city or town road intersection etc From building story yard etc Map coordinates If feasible showing latitude and longitude RESTRICTED [PAGE 60] RESTRICfED Air Type aircraft speed altitude dir ec tion of flight Distance and direction from city town or known landmark Clock position of object from observer's aircraft Latitude and longitude Sea Latitude and longitude Proxlml.ty to land Name city country etc Number of objects Formati on type any sketch l.f possible Observable celestial phenomena or planets that may account for the sighting Local fac111ties or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or ho riz ontally Angle of elevation from horizon Altitude Time sight Appearance of object a Color Shape Sketch l.f possible Apparent construction Of what material or substance Sii.e Estimated size Sl.ze as lt appeared from observer view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal oscilla ting fluttering evasive aggressive erratic tc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 61] RESTRICTED Odo if any Rate of va poration Does trail vary with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off in relation to speed 14 Suppo rt a Wings Aerodynamic 11st of fuselage Ve rtic al jet Rotating cylinder or cone Aerostatic lift balloon or dirigible 15 opulsion a opeller or je Rotor Aerodynamic vanes flapping or oscillating Katz Mayer effect Visible exhaust or jet openings 16 Control artd stability a F!.ns Stabili zers or izontal or vertical Size Shape Location RESTRICTED [PAGE 62] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P.H 19 Sound a Continuous whine or buzz Roar whistle whoosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obs tac le Relative to the Observer Name of obse rv Address Occupation Place of business a Employer or employee Pertinent hobbies a Is observer amateur astronomer pilot engineer etc Length of time engaged in hobby experience AbHity to determine a Color Speed of moving objects Size at distance Reliab111ty of bserv er a Sources RESTRICTED [PAGE 63] RESTRICTED Neighbors Police Dept FBI records Employe Notes relative to observer on a Sightings in general How attention was drawn to bj ec t(s Sound Motion Glint of light Degree of fatigue and duration of flight at tim of slghtlng in cases where observer ls airborne Witnesses a Addressees Occupation Rellablllty 10 Comments of interrogator regarding the intelllgence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any tw-ns If so what angle 180° etc and what radius of turn If radius of turn ls not observable how long did the target stay in the turn and what was its speed Note particularly any separation of distant target into several targets upon app roach Track all if possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 64] RESTRICTED Local filght schedules of commercial private and mmtary aircraft flylng In vicinity at the time Check Canadian activity If close to that border Possible releases of testing devices In vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without depression or spot whe re object landed and then presumably departed for purpose of making comparison of soils 11 object ca.me sufficiently near other aircraft or known bjects check surfaces with Gelger cowiters for possible radi oact ivity Make comparisons with other unaffected aircraft ob jects etc Obtain photographs or original negatives where available not secure sketches of a Object Surrounding terrain where obse rv ed Place here lt contacted earth lf this happened Maneuvers Formation Ii bjects were more than two Secure signed statement Obtain fragments or physical evidence wh re possibl 10 Was any adio antenna to be observed any projections or xt en tl ons that might presum ably be construed as such CABELL Major General USAF Director of Intelllgence Off i ce of Deputy Chief of Staff Operations DISTRIBUTION Commanding Gener als Major Air Commands ZI and Overseas All United States Air Attaches Dir ecto of Central Intelligence Speci al Ass i stant for Research and IntelUgence Department of State Director of Intell1gence GSUSA Chief of Naval Intelllge nce Commandant INT United States Coast Guard DI.rector Federal Bureau of Investigation RESTRIC TED [PAGE 65] RESTRICTED RESTRICTED [PAGE 66] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INI'ELLIGENCE WASHINGTON 25 15 Feb uary 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum Is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentlfied flying objects including the so-called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Nwnber dated 21 January 1948 and letter CSGID 425.1 dated 25 March HM8 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTI NG a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightin gs Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Director of Intelll gence Headquarters United States Air Force Cables wm contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0-3 RESTRICTED Cll 11 892 AF [PAGE 67] RESTRICTED Supplementary wr1tten reports prepared on AF Form 112 will be fo rwarded to the Director of Intelligence Headquarters United States Air Force Commanding General Air Materiel Command is autho riz ed direct cont act with major Air Commands overseas and or ganizations under th ei control in connection with the development of info rm ation on this ubj ec Major Air Commands ZI Reports wlll be forwarded direct to the Commanding General Air Mate ri el Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAXO-3 by insta llati ns eceiv ing informa ti on pertaining to th equ ir em en ts enunciated in Pa rt II Copies of such reports may be supplied the Command Headquarters of the installation concerned A copy of all epo rt sent to Air Materiel Command in acco rdanc with th ese instruc ti ons wlll be fo rward ed at the same tim to the Director of Intelligence Headquarters United States Air Force Written rep rt will be submitted on AF Form 112 Commanding General Air Materiel Command autho ri zed dir ect contact with major Air Commands ZI and organizati ons under their control in connection with the develop ment of info rmati on on this ubject Non-Air Fo rc Agenci es Addressees ot~er than those of the United States Air Force are equested to forward reports direct to the Commanding Gene ral Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAXO-3 In order reduce the tim factor involved in transmissi on of this type of information it is requested that wh er ver communications fac111ti es pe rmit subordinate elements be authorized to communicate rep rts direct to the Commanding General Air Materiel Com mand PART II REQUIREMENTS General Dat of sighting Time of sighting onal by 24 hr clock Where sighted bserver's position a Ground City to wn Distance and direction fr om city or town oad int ersec ti on etc From building story yard etc Map coordinat es if easib le showing latitude and longitude RESTRICTED [PAGE 68] RESTRICTED Air Type aircraft speed altltude direction of flight Distance and direction from city town or known landmark Clock position of object from observer's aircraft Latitude and longitud Sea Latitude and longitude Proximity to land Name city count ry etc Number of objec ts Formation type if any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facillties or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sketch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal osc illating fluttering evasive aggress ive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 69] RESTRICTED Odor if any Rate of evaporation Does trail va:ry with sound spurts 12 Effect on clouds a Opened path thru clouds Fo ced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off ln elation to speed 14 Support a Wings Aerodynamic list of fuselage Ve rti cal jet Rotating cy linder or cone Aer osta ti lift alloon or di ri gible 15 op ul sion a opeller or jet Roto Aerodynamic vanes flapping or osc ill ating Katz Mayer effect Visi bl exh aust or Jet openings 16 Control and st abili ty a Fins Stabillzers horizontal or vertical Size Shape Location RESTRICTED [PAGE 70] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P.H 19 Sound a Continuous whine or buzz Roar whistle wl;loosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of observer Address Occupatlon ace of business a Employer or employee Pe rtinent hobbies a Is observer amateur astronomer pl.lot engineer etc Length of time engaged in hobby experience Ability to determine a Color Speed of moving objects Size at distance Reliabi11ty of observer a Sources RESTRIC ED [PAGE 71] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to obse rver on a Sightings in general How attention was drawn to object(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases where observer ls airborne Witnesses a Addressees Occupation Reliablllty 10 Comments of interrogator regarding the lntelllgence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180 etc and what radius of turn If radius of turn is not observable how long did the target stay in the turn and what was its speed Note particularly any separation of distant target into several targets upon approach Tr ack all if possible I airborne when object sighted a Were there any radar inductions or extra noise on rad lo circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 72] RESTRICTED Local fl1ght schedules of commercial private and military aircraft flying ln vicfnity at the ti me Ch eck Canad ian activity close to that border Possible el eases of testing devices vicinity sent aloft by Ordnance Navy Air Force Army We ather Units Research Organiza ti ns or any ot her Ii object con ta cte earth ob ain soil samp es within and without ep ession or spot where obj ec landed and th en pr es umably departed for purpose of making comparison of soils If object came sufficiently ne ar other aircraft or known obj ec ts check surfaces with Geiger counters for possible radi oacti vity Make comparisons with ther unaffected aircraft bjects etc Obtain photographs or original negatives where ava ilable not secure sketches of a Object Surrounding te rrain where obse rved Place where it contacted earth if this happened Maneuvers Fo rmati on obj ec ts wer more than two Secure signed statement Obtain fragments or physical evidence where ossi bl 10 Was any adio ant nna to be obse rv ed i.e any projections or extentions that might presum ably be construed as such CABELL Major General USAF Director of Intel11gence Offi ce of Deputy Chief of Staff Operations DISTRlBUTION Commanding Generals Major Air Commands ZI and Overseas All Un it ed States Air Attaches Director of Central Intelligence Sp ec i al A ss i stant for Research and Intelllgence Department of State Di rector of Intelligence GSUSA Chief of Naval Intelligence Commandant INT Unit ed States Coast Guard Dire tor Fed ral Bureau of Investigation RESTRICTED [PAGE 73] RESTRICTED RESTRICTED [PAGE 74] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DmECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEM ORAND UM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of thi memorandum is twofold a To enunciate continuing Air Force requirements for inf rmatl on pertaining sightings of unconventional aircraft and unld entifi.ed flying bj ct including th so- called Flying Discs To esta blish procedures fo reporting such information RESCISSION Department of th Army Collection Memorandum Number dated 21 January 1948 and le tt CSGID 425.1 dated 25 March 194 both subj ect as above which have been transferred to Air Force agencies or action are herewith super seded REPORTING a General As compl ete an answer to the requirements enunciated in Pa rt Il as may be procur able should be dispatched by means of elec tr ical tran smiss i on imm ed iately aft er sightings Supplementary eports should be forwarded as available by th ost exped itl us means consistent with th importance of the inf rmati on epo rt ed Major Air Commands Over seas and Ai Attaches Initial and supplementary cabled eport will be transmitted to the Director of Intelli gence Headquarters United States Air Force Cabl es wlll contain th phase Pass COMGENAMC WRIGHT- AT TERSON AFB DAYTON OHIO ATTN MCIAX0 RESTRICTED ce-,as2,AF ha ff [PAGE 75] RESTRICTED Supplementary written eports prepared on AF Form 112 wm be forwarded to the Director of IntelHgence Headquarters United States Air Force Commanding General Alr Materiel Command ls authorized direct contact with major Air Commands overseas and organizations under their control in connection with the development of information on this subject Major Air Commands ZI Reports will be forwarded direct to th Commanding General Air Materiel Command Wright-Patterson Alr Force Base Dayton Ohio Attn MCIAXO-3 by installations receiv ing information pertaining to the requirements enunciated in Part II Copies of such eports may be supplied the Command Headquarters of the installation conce rned A copy of all reports sent to Air Materiel Command in accordance with these instruc tions will be forwarded at the same time to the Director of Intelligence Headquarters United States Air Force Written reports will be submitted on AF Form 112 Commanding General Air Materiel Command is authorized direct contact with major Air Commands ZI and organizations under their control in connection with the develop ment of information on this subject Non-Air Force Agencies Addressees otter than those of the United States Air Force are equested to forward reports direct to th Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAXO In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilltles permit subordinate elements be authorized to communicate reports direct to th Commanding General Alr Materiel Com mand PART II REQUIREMENTS General Date of sighting Time of slghtl.ng zonal by 24 hr clock Where sighted observer's position a Ground City town Distance and direction from city or town road intersection etc From building st ory yard etc Map coordinates if feasible showing latitude and longitude RESTRICTE [PAGE 76] RESTRICTED Air Type aircraft speed altitude direction of fUght Distance and direction from city town or known landmark Clock position of object from observer's aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type If any sketch if possible Observable celestial phenomena or planets that may account for the sighting cal facilltles or organizations which follow such celestial phenome na should be consulted for such information Distance of object from observer a Laterally or ho rizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sketch if possible Apparent constructlon Of what material or substance Size Estimated ize Size as it appeared from bserver's view om pared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal osc illating fluttering vasive aggressive rratlc etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 77] RESTRICTED Odor if any Rate of evaporatlon Does tr ail va ry with sound spurts 12 Effect on clouds a Opened path thru clouds For ced cloud or mists Reflected on cl oud Showed thru clo ud 13 Lights a Reflected or attached Luminous Blinked on and ff in relation to eed 14 Support a Wings Aerodynamic list of fuselage Vertical jet Rotating cylinder or cone Ae os tatic lift alloon or dirigible 15 Propulsion a Propeller or jet Rotor Aerodynamic vanes -flapping or os cl.llating Katz Mayer effect Visible exhaust or jet openings 16 Contr ol and stability a Fins Stabilizers or iz ontal or vertical Size Shape Loca ti on RESTRICTED [PAGE 78] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P 19 Sound a Continuous whine or buzz Roar whistle whoosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obs tac le Relative to the Observer Name of observer Address Occupation Place of busin ess a Employer or employee Pertinent hobbi es a Is observer amateur astronomer pilot engineer etc Length of time engaged in hobby exp er ience Ab111ty to determine a Color Speed of moving objects Size at distance Reliabillty of observer a Sources RESTRICTED [PAGE 79] RESTRICTED Neighbors Pollce Dept FBI records Employer Notes relative to observer on a Sightings In general How attention was drawn to object(s Sound Motion Glint of Ught Degree of fatigue and duration of flight at time of sighting in cases where observe ls airborne Witnesses a Addressees Occupation Reliablllty 10 Comments of Interrogator regarding the l.ntell1gence and character of person Interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay in the turn and what was I.ts speed Note particularly any separation of distant target into several targets upon approach Tr ack all l.f possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of slze speed maneuvers etc GENERAL Teletype sequences of local weather condtuons Winds aloft report RESTRICTED [PAGE 80] RESTRICTED Local flight sc ed ules of commercial private and military aircra!t flying vicinity at the time Check Canadian activity close to that border Possible rel eases of es ting devices vicinity sent aloft by rdnanc Navy Air Force Army Weather Units Research Organizations or any othe If object contacted earth obtain soil samples within and without depr ess ion or ot where object landed and th en presumably depa rted for purpose of making co mparison of soils 11 object came sufficiently near other alrcra!t or known obj ec ts check urfa ces with Geiger counters for possible radi oactivity Make comparisons with th er unaffected a1rcra!t obj ec ts etc Obtain photographs or original negatives where ava ilable if ot secure sket ch es of a Object Surrounding terrain where obse rv ed Place wher it contacted earth If thi happened Maneuve rs Fo rmati on bjects we re mor than two Secure signed statement Obtain fragments or phy sica evidence wher possible 10 Was any radi antenna to be ob se rv ed Le any projections or extentl.ons that might pr es um ably be construed as such CABELL Major General USAF Director of Intelligence Office of Deputy Chief of Sta!f Operations DISTRIBUTION Commanding Generals Major Air Commands ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence Department of State Director of Intelllgence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Dire tor Federal Bureau of Investigation RESTRI CTED [PAGE 81] RESTRICTED RESTRICTED [PAGE 82] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 Februa 1949 AIR INTELL IGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraf and unidentified flying objects including the so -called Fl ying Discs To es tablish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencles for action are herewith superseded REPORTING a Gener al As complete an answer to the requirements enunciated in Part as ma be proc ur able should be dispatched by means of electrical transm i ssion immediately after sigh ti ngs Supplementary reports should be for warded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands overseas and Air Attaches Initial and suppl ementary cabled repor ts wm be transm i tted to the Director of IntelU gence Headquarter United State:s Air Force Cables wlll contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0-3 RESTRICTED ce- 1189 AF [PAGE 83] RES RICTED Supplementary written eports prepared on AF Form 112 will be forwarded to the Director of Intelllgence Headqua rt ers United States Air Force Commanding General Air Materiel Command ls authorized direct contact with major Air Commands overseas and organizations Wlder their control in connection with the development of information on this sub ect Major Air Commands ZI Repo rt will be fo rward ed direct to the Commanding General Air Mate ri el Command Wright-Patterson Air Force Base Da yt on Oh io Attn MCIAX0 by installations ece iv in info rmati on pertaining to he equiremen ts enW1ciated in Part II Copies of su ch eports may be supplled the Command Headquarters of the in tallati on concerned A copy of all reports sen to Air Materiel Command in acco rd ance with these instruc tions wlll be forwarded at the same time to the ir ector of Intellig ence Headquarters United States Air Force Written epo rt will be submitted on AF Form 112 Commanding eneral Air Materiel Command ls authorized direct contact with major Air Commands ZI and or gan iz a ti ons W1der their control in conn ec ti on with the develop ment of info rmati on on this subj ect Non-Air Force Agencies Addressees o~e than those of the United States Air Force are equested to fo rward epo rt direct to the Commanding ene ral Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 In order to reduc th tim factor lnvolved ln transmission of thi type of lnformatlon it ls equested that wh er ever communications faciUtl es permit ubordinate elements be authorized to communicate epo rt direct to the Commanding General Air Materiel Com mand PART II REQUffiEMENTS General Date of sighting Tim of sighting zonal by 24 hr clock Wh er sighted bs rv er position a Ground City town Distance and direction from city or town road int ersec ti on tc om building story ard etc Map coo rd inates I feasible showing latit ude and longitude RESTRICTED [PAGE 84] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of obj ect from observer a ir craft La titude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type if any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facl.llties or organizations which follow such celestial phenomena should be consulted for such information Distance of object from ob server a Laterally or horizontally Angle of elevation from ho riz on Altitude Time in sight Appearance of object a Color Shape Sk etch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from obser ver's view Compared to known obj ec Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizonta osc lllatl.ng fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 85] RESTRICTED Odor if any Rate of evaporation Does trail va:ry with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mist Reflected on cl oud Showed thru cloud 13 Llghts a Reflected or a tta ched Lumin ous i Bl inked on and off in elation to speed 14 Support a Win gs Aerodynamic 11st of fuselage Vertical jet Rotating cylinder or cone Aerostatic lift ball oo or dirigible 15 Propuls ion a Pr opeller or et Roto Aer odynamic vanes flapping or osclllating Katz Mayer effect Visible exhaust or jet openings 16 Co ntrol and stability a Fins StabiU ze ri zont al or ve rti cal Size Shape Location RESTRICTED [PAGE 86] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P.H HJ Sound a Continuous whine or buzz Roar whi stle wt)oosh Intermittent 20 Mann er of disappearance a Explode PossibHity of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of observer Address Occupation Place of business a Employer or employee Pertinen hobbies a Is observer amateur astronomer pilot engin ee etc Length of time engaged in hobby experience Ab111ty to determine a Color Speed of moving obj ects Size at distance Reliablll.ty of observer a Sources RESTRICTED [PAGE 87] RESTRICTED Neighbors PoUce Dept FBI records Employer Notes relative to observer on a Sightings general How attention was drawn to object(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting In cases where observer ls airborne Witnesses a Addressees occupation Reliab111ty 10 Comments of interrogator regarding the 1nte1Ugence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn ls not observable how long did the target stay the turn and what was Its speed Note particularly any separation of distant target Into several targets upon approach Track all Ii possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 88] RESTRICTED Local flight schedules of commercial private and military aircraft flying in vic!nlty at the time Check Canadian activity close to that border Possible releases of testing devlces in vicinity sent aloft by Ordnance Navy Air Force Ar my Weather Units Research Organlzatlons or any other If object contacted earth obtain soll samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils If obj ect came sufficiently near other aircraft or lmown objects check surfaces with Gelger counters for possible rad1oact1v1ty Make comparisons with other unaffected aircraft objects etc Ob ain photographs or original negatives where available if not secure sketches of a Object ur rounding terrain where observed Place here it contacted earth lf this happened Maneuvers Formation lf objects were more than two Secure signed statement Obtain fragments or physical evidence where possible 10 Was any radio antenna to be observed Le any projections or extentlons that might presum abl be const ued as such c:P CABELL Maj or General USAF Director of Intelllgence Office of Deputy Chief of Staff Operations IS TRIBUTION Co mmanding Generals Maj or Alr Commands ZI an Overseas A ll Un it ed Stat es A lr Attaches Dir ec tor of Central In telligence Sp ec ial A ss ist ant for Resea ch and Intelligence Depar me nt of State Directo of Intelligence GSUSA Chief of Naval Intelllgence Commandant I.NT United States Coast Guard Directo Federal Bureau of Investigation RESTRICTED [PAGE 89] RESTRICTED RESTRICTED [PAGE 90] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum ls twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unldentlfled flying objec ts including the so-called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and lett CSGID 425.1 dated 25 March 1948 both subject as above which have been transfer red to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunc iat ed in Pa rt II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as ava1lable by th most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports wlll be transmitted to the Director of Intem gence Headquarters United States Al.r Force Cables wl.11 contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAXO-3 RESTRICTED ta- 8~k94'- [PAGE 91] RESTRICTED Supplementary written reports prepared on AF Form 112 wlll be forwarded to the Director of Intelligence Headquarters United States Alr Force Commanding General Air Materiel Command ls authorized direct contact with major Alr Commands overseas and organizations under their control in connection with the development of information on this subject Major Air Commands ZI Reports wm be forwarded direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MClAX0-3 by insta llati ons receiv ing information pertaining to the requirements enunciated in Part Il Coples of such epo rts may be supplied the Command Headquarters of th Installation concerned A copy of all rep rts sent to Air Mat eriel Command In ac co rdance with these instr uc tions will be forwarded at the same time to th Director of Intelllgence Headquarters United States Air Force Written reports will be submitted on AF Form 112 Commanding General Air Materiel Command Ls authorized direct contact with major Air Commands ZI and or gan izati ons under their control In connection with the develop ment of information on this subject Non-Air Force Agencies Address ees ot~er than those of th United States Air Force are requested to forward reports direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 In order to reduce the time factor involved in transmission of this type of information Lt ls requested that wherever communications facilities permit subordinate elements be authorized to communicate rep rts direct to the Commanding General Air Materiel Com mand PART II REQUIREMENTS General Date of sighting Time of sighting zonal by 24 hr clock Wh re sighted bserver's position a Ground City town Distance and direction from city or town oad intersection etc From building story yard etc Map coordinates 11 feasible showing latitude and longitude RESTRICTED [PAGE 92] RESTRICTED Air Type a1rcraft speed alutude d1rection of fUght Distance and d1rection from city town or known landmark Clock posltlon of obj ect from observer's aircraft Latitude and longitude Sea Latitude and longitude Pr ox imity to land Name city country etc Number of objects Formation type lf any sketch possible Observable celestlal phenomena or planets that may account for the sight1ng Local £ac1Uties or organizations which follow such celestial phenomena should be consulted for such Lnformatlon Distance of ob je ct from observer a Laterally or hor1zontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sk etch if possible Apparent construction Of what material or subs tan ce Size Estimated size Size as it appeared from observer's view Compared to known obj ect Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal oscllla tlng fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 93] RESTRICTED Odo if any Rate of evaporation Does trail vary wl.th sound spurt 12 Effect on clouds a Opened path thru clouds Forced cl oud or ml.sts Re.fleeted on cloud Showed thru cloud 13 Llghts a Reflected or attached Lumino us Blinked on and off in ela tion to speed 14 Support a Wings Aerodynamic li st of fuselage Vertical jet Rotating cylinder or cone Aerostatl.c lift balloon or dirigible 15 Propulsion a Propeller or je Roto Aerodynamic van es flapping or scillatlng Katz Mayer ef fect Visible exhaust or jet openings 16 Control and stabllit a Fins Stabilizers rizontal or ve rti cal Sl.ze Shape Loca ti on RESTRICTED [PAGE 94] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P 19 Sound a Continuous whine or buzz oar whistle whoosh Intermittent 20 Mann er of disappearance a Explode Possibil!.ty of fragments Other physical evidence Faded from view Disappeared behind bstac le Relat!.ve to the Observer Name of observer Addr ess Occupation Place of business a Empl oyer or employee Pe rti nent hobbies a Is ob server amateur astronomer pilot engin ee etc Length of time engaged in hobby experie nce Ability to deter mine a Color Speed of moving objects Si ze at distance Rellabillty of obse rv er a Sources RESTRICTED [PAGE 95] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in general How attention was drawn to object(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of slghtlng in cases where ob se rv er is ai borne Witnesses a Addressees Occupation ReUabiUty 10 Comments of interrogator regarding the intelUgence and character of person inter rogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn ls not observable how long did the target stay in the turn and what as its speed Note particularly any separation of distant target Into several targets upon approach Tr ack all if possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather condlt1ons Winds aloft report RES TRICTED [PAGE 96] RESTRICTED Local flight schedules of commercial private and military airc raft flying In vicinity at the tim Check Canadian activity if close to that order Poss ible rel eases of testing devices in vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without dep ression or spot where object landed and th en presumably departed for purpose of making comparison of soils If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radi oactivity Make comparisons with th er unaffected aircrait obj ec ts etc Obtain photographs or original negatives where available if not secure sketches of a Object Surrounding terrain where obse rv ed Place her it contacted earth if this happened Maneuve rs Formation objects ere more than two Secure signed statement Obtain fragm en ts or physical evidence wh er possible 10 Was any radi antenna to be observed i.e any projections or extentlons that might pr esum ably be co nstrued as such cf- CABELL Major General USAF Director of Intelllgence Office of Deputy Chief of Staff Ope rati ons DISTRIBUTION Commanding Generals Major Air Commands ZI and overseas All United States Air Attaches Dir ector of Central IntelUgence Special Ass i stant for Research and Intelligence Department of State Director o:f Intelllgence GSUSA Chief of Naval Intelligence Commandant NT United States Coast Guard Director Federal Bureau of Investigation RESTRICTED [PAGE 97] RESTRICTED RESTRICTED I I [PAGE 98] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGT ON 25 16 February 1949 AIR INTELLIGENCE REQUIREMENTS MEM ORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects including the so-called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army CollecUon Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Pa rt II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the ir ector of Intelli gence Headquarters United States Air Force Cables wm contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAXO-3 RESTRICTED 9•1189 [PAGE 99] RES TRIC ED Supplementary written reports prepared on AF Form 112 will be forwarded to the Director of Intelligence Headquarters United States Air Force Commanding General Air Materiel Command is authorized direct cont act wlth major Air Commands overseas and organizations under their control in connection with the development of information on this subjec Major Air Commands ZI Reports wlll be forwarded direct to th Commanding General A ir Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 by installations ece iv ing information pertaining to the requirements enunciated in Pa rt II Copies of such epo rts may be supplied the Command Headquarters of he installation conce rn ed A copy of all reports sent to Air Materiel Command in accor dance with these instruc ti ons will be fo rw arded at the same tim to the Director of Intelligence Head quarter United States Air Force Written epo rt will be submitted on AF Fo rm 112 Commanding General Air Materiel Command ls authorized dir ect co ntact with major Air Commands ZI and organi za ti ons under their contr ol in connection wlth th develop ment of information on this subjec Non-Air Force Agencies Addressees ot~er than those of the United States Air Force are eques ed to or ard epo rts direct to the Commanding General Alr Materiel Command Wright-Patterson Air Force Base Dayton Oh io Att MCIAX0-3 In order to edu ce the time factor involv ed in transmission of this type of information it is equ es ted th a whe rev er communications facilities permit subordinate eleme nts be authorized to communicate reports direct to th Commanding General Alr Mate ri el Com mand PART II REQUIREMENTS General Date of sighting Tim of sighting zonal by 24 hr clock Wh er sight ed ob serve r's posi ti on a Ground City town Dis tan ce an direction from city or own road intersection etc Fr om building story yard etc Map coordinates if feasible showing latitude and longitude RESTRICT ED [PAGE 100] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of obj ect from observer's ai rcraft La titude and longitude Sea Latitude and longitude Pr oximity to land ame city country etc Number of obj ects Fo rmati on type If any sketch if possible Observable elestial phenomena or planets that may account for the sighting Local faciUtles or or gan izati ons which follow such celestial phenomena should be consulted for such inf orma ti on Distance of object fr om bs erver a Laterally or horizontally Angle of ele vati on from horizon Altitude Time in sigh Appearance of objec a Color Shape Sk etch If possible Apparent construction Of what material or substance Siz Estimated size Size as lt appeared from observer's vi ew ompared to known object Dir ec tion of flight 10 Tactics or maneuvers Vertical ascen or descent horizontal oscillating fluttering evas ive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 101] RESTRICTED Odor any Rate of evaporation Does trail va:ry with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blmked on and off in relation to speed 14 Support a Wings Aerodynamic 11st of fuselage Vertical jet Rotating cylinder or cone Aerostatic liit balloon or dirigible 15 Propuls i on a Propeller or je Rot or Aerodynamic vanes flapping or osclllating Katz Mayer effect Visible exhaust or jet openings 16 Control and stability a Fins Stabilizers horizontal or vertical Size Shape Location RESTRICTED [PAGE 102] RE STRICTED 17 Air duc ts a Slot Du ct openings 18 Spe ed M.P 19 Sound a Co ntin uous whine or buzz Roa wh istle l.oosh In te itt ent 20 Manner of di sappe ar ance a Explode Poss lblUty of fr agmen ts th er hy si ca evidence Faded fr om view Di sappeare behind obs tacl Relative to th Obse rv er Name of ob se rv er Addr ess Occupa ti on Pl ac of busin ess a Em ployer or em pl oy ee Pe rtin nt hobbl es a Is bs rv er amat ur as tr onome pil ot engin ee etc Length of ti me engaged l.n hobby expe ri ence Ablllty to det er min a Color Speed of movi ng obj ec ts Size at di stan ce Reliabil it of observer a So ur ces RESTRICTED [PAGE 103] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to obser ver on a Sightings in general How attention was drawn to objec Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases wher ob se rv er is airborne Witnesses a Addressees Occupation Rellab1Uty 10 Comments of interrogator regarding the intelllgence and character of person inte rr ogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay in the turn and what was its speed Note particularly any separation of distant target into several ta gets upon appr oach ac all Ii possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 104] RESTRICTED Local flight schedules of commercial privat and military aircraft flying vicinity at the tim Ch eck Canadian activity If close to that bo rd Pos sible rel eases of testing devices in vicinity sent aloft by rdnanc Navy Air Fo ce Army Weather Units Research Organizations or any other If object co ntact ed earth obtain sol.l samples within and witho ut ep ess ion or spot wher object landed and then presumably epar ted for purp ose of making comparis on of soils If object came sufficiently ear other aircraft or known obj ects check urfa ces wi th Gelger counters for possible radi oactivity Make comparisons with th er unaffected aircraft bj ects et Obtain photographs or riginal negatives wh er available not sec ur sketches of a Object Surr ounding te rrain wh er observed Place wh ere it contacted earth lf this happened Maneuvers Fo rmati on if obj ects wer more than two Secure signed state ment Obtain fragm nts or physi cal evidence here oss ible 10 Was any radi antenna to be observed i.e any projections or exten ti ons that might presum ably be construed as such CABELL Major General USAF Dir ctor of Intelllgence Office of Deputy Chief of Sta.ff perati ons DISTRIBUTION Commanding Gene rals Major Air Commands ZI and Overseas All United States Air Attaches Dire cto of Central Intelllgence Special Assistant for Research and Intelligence Department of State Direct or of Intelligence GSUSA Chief of Naval Intelllgence Commandant INT Unit ed States Coast Guard Dir ecto Federal Bureau of Investlgatlon RESTRICTED [PAGE 105] RESTRICTED RESTRICTED [PAGE 106] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum ls twofold a To enunciate continuing Air Force requirements for information pertaining sightings of unconventional ai craft and unidentified flying objects including the so~called Flying Discs To establish procedures for reporting such information RESCISSION Department of the Army Collectlon Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for actlon are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of elec tr ical transmission immediately after sightings Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Director of Intelll gence Headquarters United State:s Air Force Cables will contain th phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAXO-3 RESTRICTED [PAGE 107] RESTRICTED Supplementary written reports pr epared on AF Fo 112 will be fo rw arded to th ir ector of Intelligence Headq uart er United States Air Force Commanding General Air Materiel Command is authorized direct cont act with major Air Commands ove rs eas and organizations under their contr ol in connec ti on with th development of info rmati on on this ubj ec Major Alr Commands ZI Reports will be fo rward ed dir ec to th Commanding General Air Mater i el Command Wright- Pa tt rs on Air Force Base Dayton Ohio Attn MCIAX0-3 by In sta ll a ti ons ece iv ing information pertaining to the requir emen ts enunciated in Part II Coples of such epo rt may be supplied the Command Headquarters of th inst a llati on conce rn ed A copy of all eports sent to Air Mate ri el Command in accordance with thes instruc tions will be fo rward ed at the same time to th Director of Intelllgence Headquarters United States Air Force Written rep rts will be submitted on AF Form 112 Commanding General Air Materiel Command ls authorized direct contact with major Air Commands ZI a nd organi za ti ons under their control in connection with th develop ment of info rmation on this ubject No n-Air Force Ag encies Addressees otqer than those of the United States Air Force are requested fo rward epo rts dir ct to the Commanding Gener al Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 In order to red ce the tlm fact or involved transmission of thi type of informa ti on it ls requested that wher ever communications faciliti es pe rmit subordinate el eme nts be authorized to communicate reports direct to the Commanding General Air ate ri el Com mand PART Il REQUIREMENTS General Date of sig hting Time of sighting zonal by 24 hr clock Whe sighted observer's posi ti on a Ground City town Distance and direction from city or to wn road Intersecti on etc From building story yard etc Map coor din ates if feasible showing latitude and longitude RESTRICTED [PAGE 108] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and direction fr om city town or known landmark Clock position of object from observer's aircraft Latltude and longitude Sea Latitude and longit ude Proximity to land Name city countr etc Number of objects Formation type any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local faclli tl es or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from ho izon Altitude Tl.me sight Appearance of object a Color Shape Sketch if possible Apparent construction Of what material or substance size Estimated size Size as it appeared from observer's view Compared to known object Dir ection of flight 10 Tactics or maneuvers Vert i cal ascent or descent horizontal osclllating fluttering evasive aggressive er ratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 109] RESTRICTED Odor if any Rate of evaporation Does trall vary with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Lumin ous Bllnked on and off l.n relation to speed 14 Support a Wings Aerodynamic list of fusel~e Vertical jet Rotating cy lin der or cone Aerostatic lift alloon or dirigible 15 Propulsion a Pr opeller or et Rotor Aerodynamlc vanes flapping or oscUlating Katz Mayer effect Visible exhaust or jet openings 16 Control and stability a Fins StabiHzers horizontal or vertical Size Shape Location RESTRICTED [PAGE 110] RESTRIC ED 17 Air ducts a Slots Duct openlngs 18 Speed M.P 19 Sound a Contlnuous wh in or buzz oar whistle wh oosh Int ermittent 20 Manner of disappearance a Explode Poss ibility of fragm ents th er phy sical evidence Faded from view Disappeared behind ob st acl Relative to the Observer Name of ob serve Addr ess Occupation Place of busin ess a Employ er or employee Pertinent hobbies a Is observer amateur astronomer pilot enginee etc Length of tim engaged in hobby exper ience Ability to dete rmin a Color Speed of moving obj ects Size at distance Re11ab111ty of observer a So urc es REST ICTED [PAGE 111] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in general How attention was drawn to oblect(s Sound Motion Glint of light Degree of fatigue and duration of flight at tim of sighting ln cases where bserver is ai rb orne Witnesses a Addressees Occupation Rell.ability 10 Comments of interrogator regarding the lntelHgence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn ls not observable how long did the target stay in the turn and what was I.ts speed Note particularly any separation of distant target into several targets upon approach Track all possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 112] RESTRICTED Local flight schedules of commercial private and m111tary aircraft flylng ln vicinlty at the tlme Check Canadian activity close to that border Possible releases of testing devices vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of sons If object came sufficiently near other aircraft or known objects check surfaces with Gelger counters for possible radioactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or original negatives where available if not secure sketches of a Object Surrounding terrain where observed Place where it contacted earth if this happened Maneuvers Formation objects were more than two Secure signed statement Obtain fragments or physical evidence where possible 10 as any adlo antenna to be observed Le any projections or extentions that might presum ably be construed as such c.P CABELL Major General USAF Director of IntelUgence Office of Deputy Chief of Staff Operations DISTRIBUTION Commanding Generals Major Air Commands ZI and Overseas A ll United St ates Air Attaches Director of Central Intelligence Speci al Ass istant for Research and Intelligence Department of State Director of Intelligence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Director Federal Bureau of Investigation AESTRICTED [PAGE 113] RESTRICTED RESTRICTED [PAGE 114] RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum ls twofold a To enW1ciate continuing Alr Force requirements for information pertaining to sightings of Wlconventlonal aircraft and Wlidentified flying objects including the so called Flying Discs To establish procedures for reporting such informatlon RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enW1ciated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Director of Intelli gence Headquarters United State:s Air Force Cables wUl contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MClAX0-3 RESTRICTED [PAGE 115] RESTRICTED Supplementary written reports prepared on AF Form 112 will be forwarded to the Director of Intelligence Headquarters United States Air Fo rc Commanding General Air Materiel Command is autho rized dir ct co ntact wlth major Air Commands overseas and organizations under their co ntrol in connection with the development of in.formation on this subject Major Air Commands ZI Reports wm be forwarded direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Oh io Attn MCIAX0- by installations receiv ing information pertaining to the requirements enunciated in Part II Coples of such reports may be supplled the Command Headquarters of the installation concerned A copy of all reports sent to Air Materiel Command in accor dance with these instruc tions will be forwarded at the same time to the Director of Intelligence Headquarters Un it ed States Air Force Written reports will be submitted on AF Form 112 Commanding General Air Materiel Command is authorized direct contact with major Air Commands ZI and organizations under their control in connectlon with the develop ment of information on this subject Non-Air Force Agencies Addressees otQer than those of the United States Air Fo rce are requested to forward reports direct to th Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAX0-3 In order to reduce the time factor involved in transmission of this type of information it is equ ested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General Air Materiel Com mand PART ll REQUIREMENTS General Date of sighting im of sighting zonal by 24 hr clock Wh ere sighted observer's position a Ground City town Distance and dir ection from city or town road intersection etc Fr om building st ry yard etc Map coordinates if easible sh owing latitude and longitude RESTRICTED [PAGE 116] RESTRICTED Air Type aLrcraft speed altltude direction of fllght Distance and direction from ci ty town or known landmark Clock positlon of object from observe r's aircraft Latitude and longitude Sea La titude and longitude Proximity to land Name city country tc Number of obj ects Formation type any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local faciliti es or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of eleva ti on from horizon Altitud Time in sight Appearance of object a Color Shape Sk etch if posslble Apparent constructlon Of what material or substance Size Estimated slze Size as it appeared from bserver's view Compared to known obj ect Direction of fllght 10 Tactics or maneuvers Vertical ascent or descent horizontal osclllat1ng fluttering evasive aggressive rratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 117] RESTRICTED Odo any Rate of evaporation Does tr ail vary wlth sound spurts 12 Eff ect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru clo ud 13 Li hts a Reflected or attached Lumlno us Blinked on and off ln ela tion to speed 14 Support a Wings Aer odynamic list of fuselage Vertical je Rotating cylinder or cone Aerostatlc llit balloon or dlr 1glble 16 Propulsion a Propeller or jet Ro or Aerodynamic vanes flapping or osc illating Katz Mayer eff ect Visible exhaust or jet openings 16 Co ntr ol and stability a Fins Stab111zers riz ontal or vertical Size Shape Loca ti on RESTRICTE [PAGE 118] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P.H 19 Sound a Continuous whlne or buzz Roar I whi stle wooosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obstacle Relatlve to the Observer Name of observer Address Occupation Place of buslness a Employer or employee Pertinent hobbies a Is observer amateur astronomer pilot engineer etc Length of tim engaged in hobby experience Ability to determine a Color Speed of moving objects Size at distance Reliability of observer a Sources RESTRICTED [PAGE 119] RESTRICTED Neighbors Police Dept FB I eco rds Employer Not es relative to bserver on a Sightings in gene ral How a tt ention was drawn to obj ec t(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases where observe is airborne Witnesses a Addressees Occupa ti on Reliability 10 Comments of interrogator egarding the intelligence and har acte of person interrogated Relative to Radar Sightings Re radars operating on gr ound a Observations of range speed altitude and size of targe Did targ et executive any turns If so wh at angle 180 etc and what radiu of turn If radiu of turn is not observable how long did th target stay in the turn and what as its speed Note particular ly any sepa rati on of distant target into se eral targets upon approach Track all Ii possible If ai rb orne wh en object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 120] RESTRICTED Local flight schedules of commercial private and m.111tar aircraft flying In vicinity at the tim Check Canadian activity close to that border Poss ible eleases of testing devices vicinity sent aloft by Ordnance Navy Ai Fo ce Army ea th er Units Research Organiza ti ons or any other If obj ec contacted arth obt ain son samples within and without depr ession or spot where bj ect landed and then presumably departed for purpose of ma.king compar i son of soils 11 object came suffici entl near other ai rcraft or known objects check urf aces with Geiger co unters for oss ib le radioactivity Make comparisons with ot her unaffected aircraft obj ects etc btain photographs or original negatives wh ere available if not secure sketches of a Objec Surrounding rrain wher observed Place wher it contacted ear th thi happened Maneuvers Fo rmati on if objects were more than two Secure signed statement Obtain ragm en ts or physical evidence wher possibl 10 Was any radi antenna to be observed Le any pr ojections or extentlons hat might presum ably be construed as such CABE LL Major Gene ral USAF Director of Intelligence Office of Deputy Chief of Staff Ope rati ons DISTRlBUTIO Commanding Generals Major Alr Commands ZI and overseas All United States Air Atta ches Dire tor of Central Intelligence Special Assistant for Research and Intelllgence Department of State Dir ector of Intelligence GSUSA Chief of Naval Intelllgence Commandant INT United Sta es Coast Guard Dir ecto Federal Bureau of Investigation ES TRI CT ED [PAGE 121] RESTRICTED RESTRICTED [PAGE 122] RESTRICTED DEPARTMENT OF THE Affi FORCE HEADQUARTERS UNITED STATES AIR FORCE DmECTORATE OF INTELLIGENCE WASHINGTON 26 15 Febr uary Hl49 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL Am.CRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects including the so-called Flying Discs To establlsh procedures for reporting such information RESCISSION Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Ai Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be proc ur able should be dispatched by means of electrical transmission immediately after sig tings Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported Major Air Commands Overseas and Air Attaches Initial and supplementary cabled reports will be transmitted to the Di ector of Intelli gence Headquarters United Statc,s Air Force Cables wm contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0-3 RESTRICTED C9•11892 AF ff [PAGE 123] RESTRICTED Supplementary writt en repor prepared on AF Form 112 wlll be forwarded to th Director of Intelll.gence Headquart ers United States Air Force Commanding General Air Materiel Command ls authorized direct cont act WI.th major Air Commands ove rs eas and or ganlzatl.ons under their control ln connection with the development of information on thi subjec Major Air Commands ZI Repo rts will be fo rward ed direct to the Commanding General Air Mater i el Command Wright-Patterson Air Fo ce Base Dayton Ohio Attn MCIAX0-3 by installations ecei ing information pertaining to th equir ements enunciated in Part II Copies of such epor ts may be supplied th Command Headq uart er of th installation conce rned A copy of all epo rt sent A ir Materiel Command in accordance with these instruc ti ons wlll be forwarded at the same ti.me to the Director of Intelligence Headquarters United States Air Fo rc Written epo rt wlll be submitted on AF Form 112 Commanding General Air Materiel Command is autho ri zed direct cont act with major Air Commands Zl and or gani za ti ons under their control ln connection with th develop ment of info rmati on on this sub ject Non-Air Force Agencies Addressees ot~er than those of th United Sta es Air Force are equested to forward reports direct to the Commanding General A ir Materiel Command Wright-Patterson Air Force Base Dayton Oh io Attn MCIAX0-3 In order to educe the ti.me factor involved in transmis i on of this type of info rmati on it is equ es ted that wher ever communications faciliti es permit subo rdinat elements be authorized to communicate reports direct to the Co mm anding General Air Materiel Com mand PART II REQUIB.EMENTS General Date of sighting Tl.me of sighting zonal by 24 hr clock Wh er ighted ob se rv er position a Ground City to wn Distance and direction fr om ity or town oad intersection etc Fr om building story yard etc Map coo rdi nat es if feasible showing latitude and longitude RESTRICTE [PAGE 124] RESTRICTED Air Type aircraft speed altitude direction of flight Distance and dlrectlon from city town or known landmark Clock position of object from observer's aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type Lf any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facilities or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time sight Appearance of object a Color Shape Sketch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal oscillating fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width RESTRICTED [PAGE 125] RESTRIC TE Odor if any Rate of evaporation Does tr all vary with sound spurts 12 Effect on clouds a Opened path thru clouds Fo ced cloud or mis ts Reflected on cloud Showed thru clo ud 13 Lights a Re fl ected or attached Luminous Bllnked on and off in relation to speed 14 Suppo rt a Wings Aer od ynamic lis of fuselage Ve rti ca jet Rotating cylinder or cone Aer os ta tic lift alloon or di ri gible 15 opulsion a ope ll er or jet Rotor Aerodynamic vanes flapping or os cill a ti ng Katz Mayer ef fect Vlslble exhaust or jet openings 16 Cont rol and stabilit a Fins Stabili ze hor izontal or vert i cal Size Shape Location RESTRICTED [PAGE 126] RESTRICTED 17 Air ducts a Slots Duct openings 18 Speed M.P.H 19 Sound a Continuous whine or buzz Roar whistle whoosh Int erm itt ent 20 Mann er of disappearance a Explode Possib111ty of fragments Other physical evidence Faded from view Disappeared behind obs tacl Relative to the Observer Name of obse rver Address Occupation Place of business a Employer or employee Pertinent hobbies a Is observer amateur astronomer pUot engineer etc Length of time engaged in hobby ex per ience Abllity to determine a Color Speed of moving objects Size at distance Rellabllity of observer a Sources RESTRICTED [PAGE 127] RESTRICTED Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in genera How attention was drawn to object(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne Witnesses a Addressees Occupation Reliability 10 Comments of interrogator regarding the Lnte111gence and character of person inter ogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target executive any turns If so what angle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay the turn and what was its speed Note particularly any separation of distant target into several targets upon approach Tr ack all possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report RESTRICTED [PAGE 128] RESTRICTED Local flight schedules of commercial private and military aircraft flying in vic1n1ty at the tlme Ch eck Canadian activity close to that border Possible releases o:f testing devices in vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If object contacted earth obtain son samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils If ob ject came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radi oactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or riginal negatives wher available if not secure sketches of a Object Surrounding terrain where observed Place wh ere it contacted earth this happened Maneuvers Fo rmati on objects were more than two Secure signed statement Obtain fragm ents or physical evidence where possible 10 Was any radi antenna to be observed Le any pr ojections or exten ti ons that might presum ably be construed as such e>:P CABELL Major General USAF Director of IntelUgence Office of Deputy Chief of Staff Operations DISTRIBUTION Commanding Generals Major Air Commands ZI and Overseas All United States Air Attaches Director of Central Intelligence Speci al Assistant for Resea ch and Intelllgence Department of State Director of Intellig ence GSUSA Chief of Naval Intelligence Commandant I.NT United States Coast Guard Dir ector Federal Bureau of Investigation RESTRICTED [PAGE 129] RESTRICTED RESTRICTED [PAGE 130] RESTRICTED DEPARTMENT OF THE Am FORCE HEADQUARTERS UNITED STATES Am FORCE DmECTORATE OF INTELLIGENCE WASHINGTON 25 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER UNCONVENTIONAL AIRCRAFT PART I GENERAL PURPOSE The purpose of this memorandum is twofold a To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentifled flying objects including the so-called Flying Discs To establish procedures for reporting such information RESCISSI ON Department of the Army Collection Memorandum Number dated 21 January 1948 and letter CSGID 425.1 dated 25 March 1948 both subject as above which have been transferred to Air Force agencies for action are herewith superseded REPORTING a General As complete an answer to the requirements enunciated in Part II as may be procur able should be dispatched by means of electrical transmission immediately after sightings Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the informaUon reported Major Air Commands Overseas and Air Attaches Init ial and supplementary cabled reports will be transm i tted to the Director of Intelli gence Headquarters United States Air Force Cables will contain the phase Pass to COMGENAMC WRIGHT-PATTERSON AFB DAYTON OHIO ATTN MCIAX0-3 RESTRICTED C9·'892,AF [PAGE 131] RESTRICTED Supplementary writt en reports prepared on AF Form 112 wlll be forwarded to the Director of Intelligence Headquarters United States Alr Force Commanding General Air Materiel Command ls authorized direct contact with major Alr Commands ove rsea and rgani zations und er the ir control ln connection wlth the development of information on this subjec Major Air Commands ZI Reports will be fo rward ed direct the Commanding Ge neral Alr Materiel Command Wright-Patters on Air Force Base Dayton Ohio Attn MCIAX by installations receiv ing information pertaining to th eq uir ments enunciated in Part II Copies of such reports may be supplied the Command Headquarters of the installation concerned A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence Headquarters United States Air Force Written reports will be submitted on AF Form 112 Commanding General Air Materiel Command is authorized direct contact with major Air Commands ZI and organizations under their control in connection with the development of information on this subject Non-Air Force Agencies Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General Air Materiel Command Wright-Patterson Air Force Base Dayton Ohio Attn MCIAXO-3 In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities per [PAGE 131] mit subordinate elements be authorized to communicate reports direct to the Commanding General Air Materiel Command PART II REQUIREMENTS General Date of sighting Time of sighting zonal by 24 hr clock Where sighted observer's position a Ground City town Distance and direction from city or town road intersection etc From building story yard etc Map coordinates if feasible showing latitude and longitude [PAGE 132] Air Type aircraft speed altitude direction of flight Distance and direction from city town or known landmark Clock position of object from observer's aircraft Latitude and longitude Sea Latitude and longitude Proximity to land Name city country etc Number of objects Formation type if any sketch if possible Observable celestial phenomena or planets that may account for the sighting Local facilities or organizations which follow such celestial phenomena should be consulted for such information Distance of object from observer a Laterally or horizontally Angle of elevation from horizon Altitude Time in sight Appearance of object a Color Shape Sketch if possible Apparent construction Of what material or substance Size Estimated size Size as it appeared from observer's view Compared to known object Direction of flight 10 Tactics or maneuvers Vertical ascent or descent horizontal oscillating fluttering evasive aggressive erratic etc 11 Evidence of exhaust a Color of smoke Length and width [PAGE 133] Odor if any Rate of evaporation Does trail vary with sound spurts 12 Effect on clouds a Opened path thru clouds Forced cloud or mists Reflected on cloud Showed thru cloud 13 Lights a Reflected or attached Luminous Blinked on and off in relation to speed 14 Support a Wings Aerodynamic lift of fuselage Vertical jet Rotating cylinder or cone Aerostatic lift balloon or dirigible 15 Propulsion a Propeller or jet Rotor Aerodynamic vanes flapping or oscillating Katz Mayer effect Visible exhaust or jet openings 16 Control and stability a Fins Stabilizers horizontal or vertical Size Shape Location [PAGE 134] 17 Air ducts a Slots Duct openings 18 Speed M.P.H 19 Sound a Continuous whine or buzz Roar whistle whoosh Intermittent 20 Manner of disappearance a Explode Possibility of fragments Other physical evidence Faded from view Disappeared behind obstacle Relative to the Observer Name of observer Address Occupation Place of business a Employer or employee Pertinent hobbies a Is observer amateur astronomer pilot engineer etc Length of time engaged in hobby [PAGE 135] experience Ability to determine a Color Speed of moving objects Size at distance Reliability of observer a Sources Neighbors Police Dept FBI records Employer Notes relative to observer on a Sightings in general How attention was drawn to object(s Sound Motion Glint of light Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne Witnesses a Addresses Occupation Reliability 10 Comments of interrogator regarding the intelligence and character of person interrogated Relative to Radar Sightings Re radars operating on ground a Observations of range speed altitude and size of target Did target execute any turns If so what angle 180° etc and what radius of turn If radius of turn is not observable how long did the target stay in the turn and what was its speed Note particula [PAGE 136] rly any separation of distant target into several targets upon approach Track all if possible If airborne when object sighted a Were there any radar inductions or extra noise on radio circuits Give estimates of size speed maneuvers etc GENERAL Teletype sequences of local weather conditions Winds aloft report Local flight schedules of commercial private and military aircraft flying in vicinity at the time Check Canadian activity if close to that border Possible releases of testing devices in vicinity sent aloft by Ordnance Navy Air Force Army Weather Units Research Organizations or any other If object contacted earth obtain soil samples within and without depression or spot where object landed and then presumably departed for purpose of making comparison of soils If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters fo [PAGE 137] possible radioactivity Make comparisons with other unaffected aircraft objects etc Obtain photographs or original negatives where available if not secure sketches of a Object Surrounding terrain where observed Place where it contacted earth if this happened Maneuvers Formation if objects were more than two Secure signed statement Obtain fragments or physical evidence where possible 10 Was any radio antenna to be observed i.e any projections or extensions that might presumably be construed as such CABELL Major General USAF Director of Intelligence Office of Deputy Chief of Staff Operations DISTRIBUTION Commanding Generals Major Air Commands ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence Department of State Director of Intelligence GSUSA Chief of Naval Intelligence Commandant INT United States Coast Guard Director Federal Bureau of Investigation RESTRICTED