https://en.wikipedia.org/wiki/Tigerfish_(torpedo)
Official Navy Images Reveal UFO Encounter In The Arctic Sea
"The incredible images of Unidentified Flying Objects in the Arctic originated from the USS Trepang, SSN 674 in March 1971."
"These images were supposedly taken in March 1971 from a United States Submarine, the USS Trepang (SSN-674), a Sturgeon-class attack submarine."
"The official location where the sighting occurred was between Iceland and Jan Mayen Island in the Atlantic Ocean. (Jan Mayen belongs to Norway, and is only inhabited by the Norwegian Meteorological Institute and the Norwegian military.)"
https://www.ancient-code.com/official-navy-images-of-ufo-encounter-in-the-arctic/