A dry deck shelter (DDS) is a removable module that can be attached to a submarine to allow divers easy exit and entrance while the boat is submerged. The host submarine must be specially modified to accommodate the DDS, with the appropriate mating hatch configuration, electrical connections, and piping for ventilation, divers' air, and draining water. The DDS can be used to deploy a SEAL Delivery Vehicle submersible, Navy divers, or Combat Rubber Raiding Craft (CRRC).
USS Dallas (SSN-700) departs Souda Bay harbor with dry deck shelter attached in 2004.
A pair of rigid-hulled inflatable boats operate alongside USS Archerfish during a 1993 exercise. Archerfish has a dry deck shelter attached to its deck.
A SEAL Delivery Vehicle (SDV) is loaded aboard the Dry Deck Shelter on the Los Angeles-class fast attack submarine USS Dallas
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
