The British lost 76 submarines during WWII.
Counting warships & merchantman, US subs sunk about 1,000 vessels.
54
Submarines do get sunk in the sea.
52 subs were sunk (lost).
4,837
Perhaps you're thinking of the liner Lusitania which was sunk by German submarines during World War One.
It was sunk by German u-boats (submarines).
109 ships of 593,864 tons in Atlantic
None beause they are all sunk in the sea because china are poor :P
after 1) Germany's submarines sunk their ships 2) they intercepted the zimmerman telegraph
There were no submarines sunk or damaged during the attack on Pearl Harbor; all vessels either sunk or damaged were capital ships (battleships, cruisers, etc.) or support vessels (tenders, tugs, etc.).
Mercury used as ballast