Dock landing ship

USS Harpers Ferry, a US Navy Harper's Ferry class dock landing ship.

A Dock landing ship or Landing ship (Dock) (hull classification LSD) is a form of amphibious warship designed to support amphibious operations. These amphibious assault ships transport and launch amphibious craft and vehicles with their crews and embarked personnel. In the United States Navy, two related groups of vessels are in service, the Whidbey Island and Harpers Ferry classes, mainly used to carry Landing Craft Air Cushions (LCACs), operate helicopters, and carry Marines. The Royal Navy also operates three ships of the Bay class.

Contents

History

The LSD came as a result of a British requirement during the Second World War for a vessel that could carry large landing craft across the seas at speed.

The first LSD came from a design by Sir Rowland Baker who had designed the British Landing Craft, Tank. It was an answer to the problem of launching small craft rapidly. The "Landing Ship Stern Chute" which was a converted train ferry was an early attempt. Thirteen Landing Craft Mechanized (LCM) could be launched from these ships down the chute. The Landing Ship Gantry was a converted tanker with a crane to transfer its cargo of landing craft from deck to sea - 15 LCM in a little over half an hour.[1]

The design was developed and built in the US for the USN and the Royal Navy. The LSD could carry 36 LCM at 16 knots. It took one and a half hours for the dock to be flooded down and two and half to pump it out. When flooded they could also be used as docks for repairs to small craft.

Vessels of this classification

United States Navy current

Currently there are two classes of LSDs in the United States Navy:

Whidbey Island class:

Harper's Ferry class:

USN former

LSD-9 through LSD-12 are Casa Grande class ships built for the British

Royal Fleet Auxiliary

Mounts Bay, a Bay-class Landing Ship Dock.

The Royal Fleet Auxiliary of the United Kingdom operates three naval auxiliaries vessels rated as Dock Landing Ships.

Bay class:

See also

Notes and references

  1. ^ Brown, D K, Nelson to Vanguard p 145

External links


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