Christopher Columbus wrote on his dairy the multiple UFO/USO sightings witnessed by him and crew members on his first travel to the American continent.
On many occasions the UFO sumerged into the ocean and viceversa.
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Christopher Columbus UFO sighting in 1492
Date: October 11,
Location: Atlantic Ocean,
In 1492, Christopher Columbus and Pedro Gutierrez while on the deck of the Santa Maira, observed, "a light glimmering at a great distance." It vanished and reappeared several times during the night, moving up and down, "in sudden and passing gleams."
Source: 'The Life and Voyages of Christopher Columbus'
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Link:
https://en.m.wikipedia.org/wiki/Christopher_Columbus
Video:
https://www.history.com/videos/columbus-ufo-sightings
