History
The SDV program dates back to World War II, when various sleds and vehicles like the Sleeping Beauty were developed for use by the Underwater Demolition Teams. After the war development continued in a garage-shop fashion by various UDT units, and included various "Marks" as the MK V, VI, VII, and XII. Intermediate numbers were assigned to some vehicles that never made it off the shop floor. All were of flooded design.
The wet vehicle SDV program (officially named the Swimmer Delivery Vehicle, sometimes erroneously designated as the SEAL Delivery Vehicle after the Swimmer Delivery Vehicle Teams were renamed SEAL Delivery Vehicle Teams) currently centers on the MK VIII MOD 1, was first established in 1975 for use among UDT/SEAL teams. The early MK8 MOD 0 SDVs had a PRC104 UHF ultra high frequency radio for use underway. The newer model MK8 MOD1 has a dual sliding canopy and quick release hatch.
Read more about this topic: SEAL Delivery Vehicle
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