chunks: 62- HQ-83894
Serials EBF 164
62-HQ-83894-EBF 164
EBF t

ENCL BEHIND FILE

62-83894-164

DO NOT
DESTROY

DO NOT DESTROY
FOIPA # 1142292

87.

20

FBI - CENTRAL RECORDS CENTER

HQ - HEADQUARTERS

| Class/Case #   | Sub   | Vol.   | Serial #   |      |
|-|-|-|-|-|
| 0062 83894     |       | 1      | 164        | ONLY |

8/11/1274166

RRP0031XG8

Guide, issued May 24, 2007.

Declassification authority derived from FBI Automatic Declassification

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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 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dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded.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 procurable, 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 will be transmitted 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: MCIAXO-3.”

additional copies needed.

62-83894-164

ENCLOSURE

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C9-4892, AF

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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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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

Air Force Academy, Colorado Springs, CO

(1) Type aircraft, speed, altitude, direction of flight.

banned (8)

IA

(2) Distance and direction from city, town or known landmark.

is the opposite!

		(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.

A set of three straight line in your

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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5 -

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(1) Neighbors.

edit

chơi đố

(2) Police Dept.

20

			(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 intelligence 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 vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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,

Director of Intelligence, GSUSA
Chief of Naval Intelligence

Commandant (INT), United States Coast Guard
Director, Federal Bureau of Investigation

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-7-

RESTRICTED

RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAXO-3."

RESTRICTED

C9-4892, AF

65-83894-164

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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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

-2-

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b. Air

conjugado nitrogenado de alquilo aromático (3)

(1) Type aircraft, speed, altitude, direction of flight.

(2) Distance and direction from city, town or known landmark.

bottles and to be recycled

		(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.

- 4 -

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5-

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(1) Neighbors.

grilling and elevating

Chabrol

(2) Police Dept.

(3) FBI records.

(4) Employer.

New abode

	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 intelligence 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 vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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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-7-

RESTRICTED

RESTRICTED

RESTRICTED

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 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 procurable, 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 Attachés

		(1) Initial and supplementary cabled reports will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2 -

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b. Air

A set of baffled microphones connected to

(1) Type aircraft, speed, altitude, direction of flight.

Compañía General de Desarrollo (C)

A

(2) Distance and direction from city, town or known landmark.

ch

		(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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- 3-

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5 -

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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 intelligence 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?

20

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.

- 6 -

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RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presuma- bly be construed as such).

<signature>
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 Attachés

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

-7-

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RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892, AF

65-83894-164

RESTRICTED

	(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 receiving 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 instructions 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 develop- ment of information on this subject.

d. Non-Air Force Agencies

	(1) 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.

	(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.

-2-

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b. Air

	(1) Type aircraft, speed, altitude, direction of flight.

(8)

(2) Distance and direction from city, town or known landmark.

A

to illuminate

		(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.

- 4-

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5-

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ent ju

(1) Neighbors.

Credro

(2) Police Dept.

(3) FBI records.

(4) Employer.

Ghent

ugab ugabix hma alidxc

	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 intelligence 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 vicinity 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. 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.

6. 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.

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 (If this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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 Attachés

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

-7%

RESTRICTED

RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2.

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b. Air

	(1) Type aircraft, speed, altitude, direction of flight.

A. ginseng (C)

		(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.

- 4-

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5-

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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 intelligence 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.

MFD

2. Winds aloft report.

- 6 -

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RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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 Attachés

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

-7.

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RESTRICTED

RESTRICTED

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 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 procurable, 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 Attachés

(1) Initial and supplementary cabled reports will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

RESTRICTED

(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)

12

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2 -

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b. Air

	(1) Type aircraft, speed, altitude, direction of flight.

151

(2) Distance and direction from city, town or known landmark.

A

addendum to the agreemebt

(3) Clock position of object from observer's aircraft.

A

		(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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- 3-

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5 -

RESTRICTED

exit to

(1) Neighbors.

Credroind

Cop

(2) Police Dept.

(3) FBI records.

(4) Employer.

To b

	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 intelligence 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.

- 6 -

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3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

.8

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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

RESTRICTED

-7-

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RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892, AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2.

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ssd So bexagon eroga padlaw greingewiggt2 (8)

b. Air

A set of ballad engravings assembled in 1807

			(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.

- 4 -

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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. Ability 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 intelligence 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.

1970

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3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

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

RESTRICTED

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RESTRICTED

RESTRICTED

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 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 procurable, 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 Attachés

(1) Initial and supplementary cabled reports will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892,AF

65-83894-164

RESTRICTED

	(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 receiving 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 instructions 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 develop- ment of information on this subject.

d. Non-Air Force Agencies

	(1) 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.

	(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.

-2-

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b. Air

Lohac'

to

(1) Type aircraft, speed, altitude, direction of flight.

15.

(2) Distance and direction from city, town or known landmark.

R.

acclamation to be replaced

(3) Clock position of object from observer's aircraft.

A subset

			(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.

- 4-

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5 -

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and 18

(1) Neighbors.

nion to include with inc

(Chabad-Lubavitch needs a gifting database and/or)

			(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 intelligence 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.

4

## GENERAL

1. Teletype sequences of local weather conditions.

2. Winds aloft report.

- 6 -

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RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (If this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

**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

RESTRICTED

-7%

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RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2 -

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b. Air

ad (II) XII mmoE 48, in betroch ,drogen natürw geschmolzene (8)

A benefit beyond any threshold, essential to your life

(1) Type aircraft, speed, altitude, direction of flight.

\( \Rightarrow \)

A

				(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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- 3 -

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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.

- 4-

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RESTRICTED

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. Ability to determine:

		a. Color.

		b. Speed of moving objects.

		c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5 -

RESTRICTED

			(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 intelligence 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 vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presuma-
bly be construed as such).

<signature>
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 Attachés

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

- 7 -

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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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892, AF

65-83894-164

RESTRICTED

	(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 receiving 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 instructions 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 develop- ment of information on this subject.

d. Non-Air Force Agencies

	(1) 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.

	(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.

-2-

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b. Air

	(1) Type aircraft, speed, altitude, direction of flight.

(8) Съездъ

		(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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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20

(1) Neighbors.

D)

			(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 intelligence 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 vicinity 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. 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.

8

6. 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.

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 (If this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presumably be construed as such).

<signature>
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 Attachés

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

-7-

RESTRICTED

RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892, AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2

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b. Air

A series hybrid microturbine/gas engine

(1) Type aircraft, speed, altitude, direction of flight.

General, A. J. Johnson (8)

2021

			(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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- 3-

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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.

- 4-

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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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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- 5-

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	(1) Neighbors.

	(2) Police Dept.

	(3) FBI records.

	(4) Employer.

8. Notes relative to observer on:

2019

		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 intelligence 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.

- 6 -

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RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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

RESTRICTED

-7-

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RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892, AF

65-83894-164

RESTRICTED

	(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 receiving 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 instructions 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 develop- ment of information on this subject.

d. Non-Air Force Agencies

	(1) 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.

	(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.

(8)

		(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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- 3-

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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.

- 4-

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RESTRICTED

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. Ability to determine:

		a. Color.

		b. Speed of moving objects.

		c. Size at distance.

7. Reliability of observer.

		a. Sources.

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- 5-

RESTRICTED

(1) Neighbors.

inamor le inimicis sibi ipsi

Credrocello

TARIFLAR

(2) Police Dept.

Mira Zou

(3) FBI records.

A

			(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 intelligence 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.

- 6 -

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RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (If this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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 Attachés

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

-7-

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RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

- 2 -

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RESTRICTED

	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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- 3-

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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.

- 4-

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RESTRICTED

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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

RESTRICTED

- 5 -

RESTRICTED

			(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 intelligence 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.

- 6

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RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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

RESTRICTED

-7-

RESTRICTED

RESTRICTED

RESTRICTED

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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892, AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

-2-

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RESTRICTED

b. Air

	(1) Type aircraft, speed, altitude, direction of flight.

	(2) Distance and direction from city, town or known landmark.

20

		(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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- 3 -

RESTRICTED

			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.

- 4-

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RESTRICTED

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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

RESTRICTED

- 5-

RESTRICTED

ent to

(1) Neighbors.

(Credrood part of ooo's II yirtuou,

(C)20

			(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 intelligence 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.

- 6 -

RESTRICTED

RESTRICTED

3. Local flight schedules of commercial, private and military aircraft flying in vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presuma-
bly be construed as such).

<signature>
C. P. CABELL
Major General, USAF
Director of Intelligence, Office of
Deputy Chief of Staff, Operations

unifrom II

## DISTRIBUTION:

Commanding Generals, Major Air Commands, ZI and Overseas
All United States Air Attachés

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

- 7 -

RESTRICTED

RESTRICTED

RESTRICTED

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 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 procurable, 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 Attachés

(1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

RESTRICTED

(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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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.

-2-

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RESTRICTED

b. Air

A set of helpful pre-tripcheck recommendations to

		(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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- 3-

RESTRICTED

			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. Ability 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 intelligence 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 vicinity 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. 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.

6. 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.

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 (If this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

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C9-4892, AF

63-83894-164

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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.

Jomtien

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 receiving 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 instructions 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 develop- ment of information on this subject.

d. Non-Air Force Agencies

	(1) 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.

	(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.

Jesuit High School

(8)

(2) Distance and direction from city, town or known landmark.

Shalom A

across and to

in

		(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. Ability to determine:

	a. Color.

	b. Speed of moving objects.

	c. Size at distance.

7. Reliability of observer.

	a. Sources.

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2017-2018

(1) Neighbors.

yastikli bol esyalar

Combined Index

			(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 intelligence 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 vicinity 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. 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.

.6

6. 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.

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 (If this happened).

	d. Maneuvers.

	e. Formation if 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 extentions that might presum-ably be construed as such).

<signature>
C. P. CABELL
Major General, USAF
Director of Intelligence, Office of
Deputy Chief of Staff, Operations

united we

## DISTRIBUTION:

Commanding Generals, Major Air Commands, ZI and Overseas
All United States Air Attachés

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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-7-

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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 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 procurable, 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 will be transmitted 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: MCIAXO-3."

RESTRICTED

C9-4892,AF

63-83894-164

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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 receiving 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 instructions 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 develop- ment of information on this subject.

## d. Non-Air Force Agencies

(1) 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.

(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

A bottle of bourbon, someplace to relax

(1) Type aircraft, speed, altitude, direction of flight.

(2) Distance and direction from city, town or known landmark.

and so on

		(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. Ability 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 intelligence 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?

800

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 vicinity 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. 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.

6. 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.

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 (if this happened).

	d. Maneuvers.

	e. Formation if 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 extention that might presum-ably be construed as such).

<signature>
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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