On August 4, 1950, the crew of the merchant ship Marcala was on a routine voyage from Nova Scotia to Delaware. It was morning and the sky was clear as they sailed over the Hudson Canyon, the largest abyss off the east coast of the United States.
Over the next hour, they will experience something so strange that it indicates the effect of this phenomenon on human perception and even on time.
This case is documented in little-known CIA and US Air Force files documenting a UFO that looked different to three sailors on the same ship.
This video recreates this incident by reconstructing the incident in 3D computer graphics.