Introduction
PT (Patrol, Torpedo) boats were small, fast, and expendable vessels for short range oceanic scouting, armed with torpedoes and machine guns for cutting enemy supply lines and harassing enemy forces. Forty-three PT squadrons, each with 12 boats were formed during World War II by the U.S. Navy. PT boat duty was very dangerous and the squadrons suffered an extremely high loss rate in the war.
Source: U.S. Department of the Interior, National Park Service