Documents / Official release
This U.S. Department of War file collects Project Sign era checklists and incident summary sheets for incidents 101 to 172. The largest item is the 18 February 1948 explosion over Norcatur, Kansas. For it the file gathers witness statements, speculative letters from Norman G. Markham, and Dr. Lincoln LaPaz's view that it was a genuine meteorite fall with curious aspects. Other entries cover B-29 crews, a two-decked wingless object over the Netherlands, a Turkish rocket report, a Moscow sighting, and George Gorman's 1 October 1948 Fargo encounter.
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.
“Holloman Air Force Base”1 page
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS
Incident # 124
1. Date 18 April 1948
2. Time 1500 GCT
3. Location North Atlantic, $ 6 2^{\circ} 0 0^{\prime} \mathrm{N} $ $ 3 3^{\circ} 0 0^{\prime} \mathrm{W} $
4. Name of observer N/S
5. Occupation of observer Weather station patrol
6. Address of observer First Coast Guard District
7. Place of observation Air
8. Number of objects One
9. Distance of object from observer 6500 yards - 18000 yards
10. Timo in sight N/S
11. Altitude N/S
12. Speed 30 mph
13. Direction of flight N/S
14. Tactics N/S
15. Sound N/S
16. Size N/S
17. Color N/S
18. Shape N/S
19. Odor detected N/S
20. Apparent construction N/S
21. Exhaust trails N/S
22. Weather conditions C.A.V.U.
23. Effect on clouds N/S
24. Sketches or photographs None
Manner of disappearance Target strength was S5 fading at 18,000 yards
26. Remarks: This incident is the result of a radar sighting. Copy is also filed in radar sighting file. Official release, from the pursue collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 178 pages are in the text index: search them above, or from the library's search.