Summary and Key Points: The USS Bullhead (SS-332), a Balao-class diesel-electric submarine, was the last American submarine lost in combat. Sunk by Japanese aircraft off Bali on August 6 ...

Now a museum exhibit in Philadelphia, it is the only GUPPY 1-A submarine left in the world. Built in 1943, the USS Becuna is a Balao-class submarine with a Greater Underwater Propulsive Power, or ...