SEAL Delivery Vehicle
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The SEAL Delivery Vehicle (SDV) is a crewed submersible and a type of swimmer delivery vehicle used to deliver United States Navy SEALs and their equipment for special operations missions. It is operated by SEAL Delivery Vehicle Teams.
SEAL Delivery Vehicle Team Two launch an SDV from Los Angeles-class submarine USS Philadelphia
A Seal Delivery Vehicle maneuvers into a drydeck on the submarine USS Kamehameha
US Navy SEALs deploy a torpedo-armed Mark 9 SDV from a submarine
A Mark 8 SDV is loaded aboard Los Angeles-class submarine USS Dallas
Diver propulsion vehicle
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A diver propulsion vehicle (DPV), also known as an underwater propulsion vehicle, sea scooter, underwater scooter, or swimmer delivery vehicle (SDV) by armed forces, is an item of diving equipment used by scuba divers to increase range underwater. Range is restricted by the amount of breathing gas that can be carried, the rate at which that breathing gas is consumed, and the battery power of the DPV. Time limits imposed on the diver by decompression requirements may also limit safe range in practice. DPVs have recreational, scientific and military applications.
Recreational diver using a lightweight diver propulsion vehicle
Two U.S. Marines of the Maritime Special Purpose Force operating a Diver Propulsion Device (DPD)
Two divers scootering with heavy duty DPVs
An Italian maiale type manned torpedo, at the Royal Navy Submarine Museum.