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.
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INCIDENT JUMMARY SHEET Incident No. 186 1. Date and Time of Observation: 16 Oct 1948 1145 in the morning 2. Where Sighted: 1 mile south and 8 miles due east of Sterling, Utah 3. Observer's Position: ground - from mountain ridge at 9,000 ft (i.e., ground, air, control tower, etc.) 4. Name and Address of Observer: Mr Fred Nash, 20 East Crystal, Salt Lake City, Utah 5. Occupation and/or position 5. Occupation and/or hobbies: Used car dealer and airplane mechanic Member of Latter Day Saints Church (did missionary work in Hawaii) 6. Attention Attracted by: 6. Attention Attracted by: sound of throbbing noise 7. Number of Object(=) Seen: 1 8. Size of Object(s): 9 inches long, 6 inches wide and 3 inches thick 9. Color of Object(s): silver and black (silver stripe running down the center of the underside) See drwg. 10. Shape (Sketch if Possible) similar to a flat football of the underside 11. Nature of Luminosity: N/S (directed beam of light?) 12. Altitude of Object: 500 ft overhead (estimated) 15. Estimated Distance of Object from Observe: 500 ft 14. Estimated Speed of Object: 300 mph 15. Time in sight: 4 seconds or longer 16. Tactics: horizontal flight 17. Sound made by Object(s): throbbing noise or steady purr 18. Direction of Flight of Object(e) north and a little west (in general direction of Salt Lake City, Utah) 19. Apparent Construction: N/S 19. Apparent Construction: N/S 20. Effect on Clouds: no clouds in the sky 21. Exhaust Trail Color of): no visible sign of exhaust; however, an opening could be seen in the center of the object from the rear. 22.anner of Discomerance: N/S 22. manner of Disappearance: N/S 23. Weather Conditions at Time of Sighting: calm with no clouds in the sky 24. Peculiarities Noted: 25. Summary of Incident: (over) (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.