The vertical part near the middle of the submarine is the sail. If you're talking about the fin at the very back it's the rudder.
Goalkeeper, right back, left back, centre back, midfielder, wing forward, right wing, left wing, centre forward, striker,
The back of a bird's wing. :D
The submarine is manned by the crew, and crew members are called submariners.
The 'helmsman' steers a submarine.
It is just called the wing.
If you are referring to the distance from wing tip to wing tip, it is usually called "wingspan".
when bats sleep there wing will grow back.
Fulton designed a submarine called Nautilus.
the wing flap
An aircraft wing that is angled back.
The USN's submarine force in WWII was called the SILENT SERVICE.
The H. L. Hunley was the name of the Confederate submarine that was the first combat submarine to sink an enemy ship.