Documents / Official release
This U.S. Department of War file, undated, holds checklist summaries of incidents 1 to 100 of unidentified flying objects reported in 1947 and early 1948. The first entries cover sightings of silver discs and spheres by officers and staff at Muroc Army Air Field on 7 and 8 July 1947. Next come the Portland, Oregon police reports of 4 July, a United Air Lines crew near Emmett, Idaho, and a set of 30 December flame and explosion reports from California and Nevada. The file ends with two Finnish 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.
Read from the scan by GLM-OCR; expect the odd misread word.
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS Incident 1. Date 4 July 1947 2. Time 1305 3. Location Portland, Oregon 4. Name of observer Gept. K. A. Prehn 5. Occupation of observer Harbor Pilot. 6. Address of observer Ft NW Irving St., Portland 7. Place of observation 8. Number of objects 3 to 6 - unable to ascertain 9. Distance of object from observer X/S 10. Time in sight N/S 11. Altitude High 12. Speed terrific 13. Direction of flight South over the Globe Mills 14. Tactics oscillated, wobbled, disappeared & reappeared. 15. Soundd N/S 16. Size N/S 17. Color chromium - shiny 18. Shape full disc, half-moon shape, then nothing. 19. Odor detected N/S 20. Apparent construction I/S 21. Exhaust trails N/S 22. Weather conditions M/S 23. Effect on clouds N/S Sketches or photographs I/S 25. Manner of disappearance disappeared and reappeared 26. Remarks: (over)
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. 209 pages are in the text index: search them above, or from the library's search.