The United States Navy's Sea, Air and Land Teams, commonly known as the Navy SEALs, are the U.S. Navy's primary special operations force and a component of the Naval Special Warfare Command.
The SEAL Delivery Vehicle (SDV) is a manned submersible and a type of Swimmer Delivery Vehicle or diver propulsion vehicle used to deliver United States Navy SEALs and their equipment for special operations missions. SDV are generally launched from a Dry Deck Shelter on the back of a submarine, or from amphibious carriers (surface craft) equipped to launch and recover the SDV.
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