USS Trepang Submarine USO/UFO Encounter of 1971

In March of 1971 the USS Trepang submarine encountered a very large USO/UFO and what seems to be an escort craft somewhere between Iceland and Jan Mayen that was on a routine military and scientific mission. Apparently the occupants of the craft didn't like the submarine hanging out around their position and decided to exit the water and take off. Image credits - US Navy