ESB-8 -- Montford Point class
An Expeditionary Transfer Dock (ESD), formerly the Mobile Landing Platform (MLP), is designed to be a semi-submersible, flexible, modular platform providing the US Navy with the capability to perform large-scale logistics movements such as the transfer of vehicles and equipment from sea to shore. These ships significantly reduce the dependency on foreign ports and provide support in the absence of port availability. The class also houses a sub-class variant called the Expeditionary Mobile Base (ESB), formerly the Afloat Forward Staging Base (AFSB). Effective 4 September 2015, U.S. Secretary of the Navy Ray Mabus officially announced the creation of a new ship designation, “E” for expeditionary support.
The Navy plans to procure six Expeditionary Mobile Bases (ESBs) in total, with a fourth (ESB-6) ordered in FY2018, a fifth (ESB-7) ordered in FY2019, and the sixth and final ship (ESB-8) with an order date yet to be determined.
The Expeditionary Transfer Dock concept is a large auxiliary support ship to facilitate the ‘seabasing’ of an amphibious landing force by acting as a floating base or transfer station that can be prepositioned off the target area. Troops, equipment, and cargo would be transferred to the ESD by large-draft ships, from where they can be moved ashore by shallower-draft vessels, landing craft like the Landing Craft Air Cushion (LCAC), or helicopters. For transferring vehicles from the larger ships to the ESD, the vessels were originally to be fitted with a Vehicle Transfer System: a ramp connecting the two ships alongside and able to compensate for the movements of both vessels while underway.
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