Documents / Official release
This Air Materiel Command file, released by the U.S. Department of War, holds Incident Summary Sheets 173 through 233, sent under a 1949 transmittal. Most of the sheets record sightings of unidentified aerial objects in 1948 and early 1949. They cover Santa Fe, New Mexico, San Pablo, California, Honolulu, Kentwood, Louisiana, and Jackson, Mississippi. Each sheet gives the observer's details and the object's size, speed and shape, and often an investigator's note on how reliable the witness seemed. The file ends with a blank guide for investigating reports, including radar sightings.
From the source:Release of 2026-05-08 Incident: N/A, N/A. NARA Record Group 38, catalogue id 143685. Each of these incident summaries includes a "Check-List - Unidentified Flying Objects" that contains details about the incident. Many summaries also include witness lists or statements and other narrative reports or descriptions.
“Cooper”1 page
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## INCIDENT SUMMARY SHEET Incident No. 215 1. Date and Time of Observation: 3 Dec 1948 2015 2. Where Sighted: Fairfield-Suisun AF Base, Calif - north of field 3. Observer's Position: control tower (thru 8-power binoculars) (i.e., ground, air, control tower, etc.) 4. Name and Address of Observer: Control Tower personnel 5. Occupation and/or hobbies> control tower personnel 6. Attention Attracted by: N/S 7. Number of Object( n ) Seen: 1 8. Size of Object(n): 1 to 2 feet in diameter 9. Color of Object(s): bright light 10. Shape (Sketch if Possible) Circular 11. Nature of Luminosity: like a ramp flood light (directed beam of light?) 12. Altitude of Object: When first sighted: 1 to 2,000 ft - climbed to (estimated) 20,000 feet 13. Estimated Distance of Object from Observ. r: N/S 14. Estimated Speed of Object: 400 to 500 MPH 15. Time in sight: N/S 16. Tactics: Began rapid climb but erratic - like change to pace 17. Sound made by Object(s): no sound heard 18. Direction of Flight of Object(s) climbed toward southeast 19. Apparent Construction similar to a ramp floodlight 20. Effect on Clouds: N/S 11. Exhaust Trail (Color of): none 22. Name of Disappearance: N/S 23. Weather Conditions at Time of Sighting: 15 miles visibility, wind 24. Peculiarities Noted: Intensity of the light 25. Summary of Incident: (See attached page)
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 144 pages are in the text index: search them above, or from the library's search.