A dock landing ship (also called landing ship, dock or LSD) is an amphibious warfare ship with a well dock to transport and launchlanding craft and amphibious vehicles. Some ships with well decks, such as the Soviet Ivan Rogov class, also have bow doors to enable them to deliver vehicles directly onto a beach ( like a tank landing ship ). Modern dock landing ships also operate helicopters.
A ship with a well deck (docking well) can transfer cargo to landing craft in rougher seas than a ship that has to use cranes or a stern ramp. The US Navy hull classification symbol for a ship with a well deck depends on its facilities for aircraft – a (modern) LSD has a helicopter deck, a LPD also has a hangar, and a LHD or LHA has a full- lengthflight deck.
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