65: HS1-834228961 62-HQ-83894 시리얼 164

The FBI's 62-HQ-83894 case file includes investigative records, eyewitness testimonies, and public reports concerning Unidentified Flying Objects and flying discs documented between June 1947 and July 1968. The records include high-profile incident accounts, photographic evidence from sites like Oak Ridge, TN, and technical proposals regarding potential propulsion systems. Additional topics include convention programs, researcher accounts, and extensive media coverage from the period. This file is partially posted on FBI vault with more redactions and some pages missing. Included here is the complete case file with several newly declassified pages and only minor redactions.

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DEPARTMENT OF THE AIR FORCE
HEADQUARTERS UN1TED STATES AIR FORCE
DIRECTORATE OF INTELLIGENCE
WASHINGTON 25, D. C.
15 February 1949
AIR INTELLIGENCE REQUIREMENTS
MEMORANDUM NUMBER 4
UNCONVENTIONAL AIRCRAFT
PART I - GENERAL
1. 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."
b. To establish procedures for reporting such information.
2. RESCISSION
Department of the Army Collection Memorandum Number 7, 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Force agencies for action, are herewith superseded.
3. REPORTING
a. General
(1) 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 afte:' sighttngs.
(2) Supplementary reports should be forwarded as availabl e by the most expeditious means
consistent with the importance of the information reported.
b. Major Air Commands (Overseas) and Air Attaches
(1) Initial and supplementary cabled reports will be transmitted to the Dir ector of Intelli­
gence, Headquarters United States Air Force. Cables will contain the phase, " Pass to
COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAXO-3."
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(2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the
Director of Intelligence, Headquarters United States Air Force.
(3) 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.
c. Major Air Commands (ZI)
(1) 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.
(2) Copies of such reports may be supplied the Command Headquarters of the installation
concerned.
(3) 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.
(4) Written reports will be submitted on AF Form 112.
(5) 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.
d. Non-Air Force Agencies
(1) 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.
(2) 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
1. Date of sighting.
2. Time of sighting (zonal by 24 hr. clock).
3. Where sighted (observer's position):
a. Ground
(1) City, town.
(2) Distance and direction from city or town, road, intersection, etc.
(3) From building (story), yard, etc.
(4) Map coordinates (if feasible) showing latitude and longitude.
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b. Air
(1) Type aircraft, speed, altitude, direction of flight.
(2) Distance and direction from city, town or known landmark.
(3) Clock position of object from observer's aircraft.
(4) Latitude and longitude.'
c. Sea
(1) Latitude and longitude.
(2) Proximity to land. (Name city, country, etc.)
4. Number of objects.
Formation type (if any), sketch if possible.
5. 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.)
6. Distance of object from observer.
a. Laterally or horizontally.
b. Angle of elevation from horizon.
C. Altitude.
7. Time in sight.
8. Appearance of object.
a. Color.
b. Shape. (Sketch if possible)
c. Apparent construction. (Of what material or substance)
d. Size.
(1) Estimated size.
(2) Size as it appeared from observer's view. (Compared to known object)
9. 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.
, b. Length and width.
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c. Odor (if any).
d. Rate of evaporation.
e. Does trail vary with sound? (spurts)
12. Effect on clouds.
a. Opened path thru clouds.
b. Forced cloud or mists.
c. Reflected on cloud.
d. Showed thru cloud.
13. Lights.
a. Reflected or attached.
b. Luminous
c . Blinked on and off in relation to speed.
14. Support
a. Wings.
b. Aerodynamic list of fuselage.
c. Vertical jet.
d. Rotating cylinder or cone.
e. Aerostatic lift (balloon or dirigible).
15. Propulsion.
a. Propeller or jet.
b. Rotor.
c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect).
d. Visible exhaust or jet openings.
16. Control and stability.
a . Fins
b. Stabilizers (horizontal or vertical).
(1) Size.
(2) Shape.
(3) Location.
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17. Air ducts.
a. Slots.
b. Duct openings.
18. Speed - M.P.H.
19. Sound.
a. Continuous whine or buzz.
b. Roar, whistle, whoosh.
c. Intermittent.
20. Manner of disappearance.
a. Explode.
(1) Possibility of fragments.
(2) Other physical evidence.
b. Faded from view.
c. Disappeared behind obstacle.
Relative to the Observer
1. Name of observer.
2. Address.
3. Occupation.
4. Place of business.
a. Employer or employee.
5. Pertinent hobbies.
a. Is observer amateur astronomer, pilot, engineer, etc.
b. Length of time engaged in hobby (experience).
6. AbUity to determine:
a. Color.
b. Speed of moving objects.
c. Size at distance.
7. Reliability of observer.
a. Sources.
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(1) Neighbors.
(2) Police Dept.
(3) FBI records.
(4) Employer.
8. Notes relative to observer on:
a. Sightings in general.
b. How attention was drawn to object(s).
(1) Sound.
(2) Motion.
(3) Glint of light.
c. Degree of fatigue and duration of flight at time of sighting in cases where observer is
airborne.
9. Witnesses.
a. Addressees.
b. Occupation.
C. Reliability.
10. Comments of interrogator regarding the intell1gence and character of person interrogated.
Relative to Radar Sightings
1. Re radars operating on ground.
a. Observations of range, speed, altitude and size of target.
b. 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?
c. Note particularly any separation of distant target into several targets upon approach. Track
all if possible.
2. If airborne when object sighted.
a. Were there any radar inductions or extra noise on radio circuits?
b. Give estimates of size, speed, maneuvers, etc.
GENERAL
1. Teletype sequences of local weather conditions.
2. Winds aloft report.
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3. Local flight schedules of commercial, private and military aircraft flying in vic!nity at the
time. (Check Canadian activity if close to that border.)
4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force,
Army, Weather Units, Research Organizations or any other.
5. Jf 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.
6. Jf 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.
7. Obtain photographs (or original negatives) where available; if not, secure sketches of:
a. Object.
b. Surrounding terrain where observed.
c. Place where it contacted earth (ii this happened).
d. Maneuvers.
e. Formation ii objects were more than two.
8. Secure signed statement.
9. 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).
c>:1-?~
C. P . 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
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DEPARTMENT OF THE AIR FORCE
HEADQUARTERS UNITED STATES AIR FORCE
DIRECTORATE OF INTELLIGENCE
WASHINGTON 25, D. C.
15 February 1949
AIR INTELLIGENCE REQUIREMENTS
MEMORANDUM NUMBER 4
UNCONVENTIONAL AIRCRAFT
PART I - GENERAL
1. 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."
b. To establlsh procedures for reporting such information.
2. RESCISSION
Department of the Army Collection Memorandum Number 7, 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.
3. REPORTING
a. General
(1) 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.
(2) Supplementary reports should be forwarded as available by the most expeditious means
consistent with the importance of the information reported.
b. Major Air Commands (Overseas) and Air Attaches
(1) Initial and supplementary cabled reports wlll be transmitted to the Director of Intelll­
gence, Headquarters United State:s Air Force. Cables will contain the phase, "Pass to
COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAX0-3."
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(2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the
Director of Intelligence, Headquarters United States Air Force.
(3) 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 thl.s subject.
c. Major Air Commands (ZI)
(1) Reports wlll be forwarded direct to the Commanding General, Al.r Materiel Command,
Wright-Patterson Al.r Force Base, Dayton, Ohio, Attn: MCIAXO-3 by installations receiv­
ing lnformation pertaining to the requirements enunciated in Part II.
(2) Copies of such r eports may be supplied the Command Headquarters of the installation
concerned.
(3) A copy of all r eports sent to Air Materiel Command in accordance with these instruc­
tions wlll be forwarded at the same ti.me to the Director of Intelligence, Headquarters
United States Air Force.
(4) Written r eports will be submitted on AF Form 112.
(5) Commanding General, Air Materiel Command is authorized direct contact with major
Air Commands (ZI) and organizations under thel.r control in connection wl.th the develop­
ment of information on this subject.
d. Non-Air Force Agencies
(1) Addressees otQer than those of the United States Air Force are requested to forward
reports direct to the Commanding General, Al.r Materiel Command, Wright-Patterson Air
Force Base, Dayton, Ohio, Attn: MCIAXO-3.
(2) In order to reduce the ti.me factor involved in transmission of this type of information
it is requested that, wherever communications facilities permit, subordinate elements be
authorized to communicate reports dir ect to the Commanding General, Air Materiel Com­
mand.
PART Il - REQUIREMENTS
General
1. Date of sighting.
2. Time of sighting (zonal by 24 hr. clock).
3. Where sighted (observer's position):
a. Ground
(1) City, town.
(2) Distance and direction from city or town, road, intersection, etc.
(3) Fr om building (story), yard, etc.
(4) Map coordinates (lf feasible) showing latitude and longitude.
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b. Air
(1) Type aircraft, speed, altltude, direction of flight.
(2) Distance and direction from city, town or known landmark.
(3) Clock position of object from observer's aircraft.
(4) Latitude and longitude.
c. Sea
(1) Latitude and longitude.
(2) Proximity to land. (Name city, country, etc.)
4. Number of objects.
Formation type (l.f any), sketch l.f possible.
5. Observable celestial phenomena or planets that may account for the slghtlng. (Local fac111t!.es
or organizations which follow such celestial phenomena should be consulted for such information.)
6. Distance of object from observer.
a. Laterally or horizontally.
b. Angle of elevation from horizon.
c. Altitude.
7. Time in sight.
8. Appearance of object.
a. Color.
b. Shape. (Sketch ti possible)
c. Apparent construction. (Of what material or substance)
d. Size.
(1) Estimated size.
(2) Size as Lt appeared from observer's view. (Compared to known object)
Q. 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.
, b. Length and width.
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