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Category Shape / form From year To year Country Time of day Witnesses Evidence Status Duration Sound Colour Motion Lights Sources include Min photos Min videos Min sources Min score Sort order

3D model Narrated

“vertical ascent”

Stories1

The Pretoria Police Helicopter UFO Chase

August 28, 1996 · Erasmuskloof, Pretoria, to Cullinan, Gauteng

South Africa

UAP · Disc / saucer · 15 sources

37Partially documented

Documents45 · see all

(Deleted) Sighting of Unidentified Airborne Objects Near Leningrad/(Dele Ted) FOIA release

Central Intelligence Agency· 1958-09-05· 3 pages· 1 page mentions it
- p. 3 …I could not judge the speed of ascent, nor could I tell how far away the objects were, but they…
Numerical File, 5-2500 Official release

U.S. Department of War· 1955-10-14· 10 pages· 2 pages mention it
- p. 3 …SAME DURING ASCENT AS IN CRUISE, LIKE A DISCUS IN FLIGHT. TWO OPERATING SEARCHLIGHTS POINTING ALMOST VERTICAL SEEN NEAR TAKEOFF…
- p. 4 …angle of ascent was not exactly "straight up" but rather in a slight arc just off the vertical line.) 4…
FBI file 62-HQ-83894, serial 164 Document

Department of War· 137 pages· 17 pages mention it
- p. 4 …Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc . 11. Evidence of exhaust. a. Color of smoke. , b…
- p. 36 …Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. , b…
65 HS1-834228961 62-HQ-83894 Serial 164 Official release

Federal Bureau of Investigation· 137 pages· 17 pages mention it
- p. 4 …Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc . 11. Evidence of exhaust. a. Color of smoke. , b…
- p. 36 …Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. , b…
Current Intelligence Bulletin- 1955/10/15 FOIA release

Central Intelligence Agency· 1955-10-15· 9 pages· 1 page mentions it
- p. 5 …same during ascent as in cruise, like a discus in flight. Two operating searchlights pointing almost vertical seen near take…
AFOSI LaPaz Catalog raw data Document

NICAP· 22 pages· 2 pages mention it
- p. 3 …1 Unk Grants, New Mexico Southward vertical climb then leveled off. Gradual ascent white Yes none oval larger than meteor…
- p. 11 …above horizon #1,3&4 almost horizontal, #2 almost vertical white with orange Yes 1 sec for each one none…

All 45 documents →