Possible U-Boat Discovery near CFB Goose Bay (Former Goose AFB)

A Search And Rescue Sonar searching for three men may have discovered a U-Boat in the river. This is very unusual as it is located about 170 miles inland from the Atlantic Ocean and is also the site of CFB Goose Bay (Formerly Goose AFB).

CFB Goose Bay was built in 1941 by Canada and the United States for anti-submarine operations and to stage aircraft to fly to Britain. If this is an actual U-Boat then I would be curious to know what it's mission was, most likely to spy on the operations at that base. Pretty interesting find:

http://www.cbc.ca/news/canada/newfoundland-labrador/story/2012/07/25/nl-u-boat-labrador-discovery-725.html