April 18, 1952 — Korea Strait north of Kyushu Island, Japan
12:07 p.m. Detachment 21 of the 618th Aircraft and Warning Squadron, Japan Air Self-Defense Force, picks up a radar target over the Korea Strait north of Kyushu Island, Japan, moving at 2,700 mph. [Eberhart]
Air Intelligence Report:
Sources:
Brad Sparks, Blue Book Unknown Catalogue, Case 548, p. 127;
NICAP, “Object Tracked at 2,700 MPH”;