MK 7 Swimmer Delivery Vehicle (SDV)

The MK 7 Mod 6 swimmer delivery vehicle (SDV) was used by Navy Special Operations Forces (SOF) and Underwater Demolition Teams (UDTs) during the late 1960s and early 1970s, including during the Vietnam War. SDVs are small, free-flooding submersibles that allow the...

Trieste II (DSV 1)

Trieste II (DSV 1) was the first deep submergence vehicle (DSV) built by the U.S. Navy and the successor to the original Trieste bathyscaphe. Trieste II performed undersea research and tasks, including examining the remains of USS Scorpion in 1969. Information...

DSRV Mystic

Deep submergence rescue vehicle (DSRV) Mystic provided rapid-response submarine rescue capability to the U.S. Navy from 1970 to 2008. In the event of a submarine accident, Mystic or her sister submersible Avalon could be deployed rescue survivors anywhere in the...

Sealion II (SS 315) Battle Flag

Submarine battle flags emerged during World War II as a way of marking the number of enemy ships a submarine sank. The designs and symbols used in these unofficial records varied, as each battle flag was individually sewn by the crew of a particular submarine. Most...

USS Tecumseh (SSBN 628) Torpedo Tubes

USS Tecumseh (SSBN 628) was a James Madison-class ballistic missile submarine. She was built by the Electric Boat Company in 1962, launched June 22, 1963, and commissioned on May 29, 1964. As an SSBN, Tecumseh was operated by alternating blue and gold crews that...