In 1941, the crew of HMS Trident were given a reindeer as a gift by the USSR navy.Check out the rest of the story to see what happened next.
The 56 crewmen spent six weeks sharing their already confined living accommodation with the fully-grown reindeer nicknamed Pollyanna...
... Living with a reindeer underwater in wartime conditions inevitably posed challenges for the crew. A barrel of moss given by the Russians soon run out and Pollyanna lived on scraps from the galley. She also developed a taste for wartime favourite, Carnation condensed milk.
Pollyanna was originally lowered into the submarine through a torpedo tube of the sub and it was hoped she could sleep in the torpedo and food store. However she apparently had more refined tastes and insisted on sleeping under the captain's bed.
Bill Sainsbury said: "There are lots of funny stories - apparently when the submarine surfaced for air, she would barge her way through the narrow corridors to the main hatch to get some fresh air before returning to the officers' mess."
Despite Pollyanna eating a navigation chart, the crew made it back to the UK where HMS Trident landed at Blyth in Northumberland.
However as the reindeer had over-indulged on condensed milk, she had actually put on weight and could not be fitted out through the torpedo tube.
Have you ever had a mascot on the boat?
