Hi guys its really an interesting UFO/USO sighting case ,which happened in Shag Harbor, Nova Scotia ,Canada ,1976.Two UFOs went underwater becoming USOs during October 1967 in Nova Scotia Canada. They both headed toward an American Navel base. This is one of very few cases where governmental agency documents (RCMP Canada) have formally declared an Unidentified Flying Object was involved.
Here is the Animation as it happened back in 1976
And here is Canada UFO Documentary which talks about detailed eyewitness accounts:-
Part-2 Part-3 Part-4 Part-5 Part-6