'definitive' LPH design, the Iwo Jima class would be the only class to be built as such, with sufficient 'hotel' accommodations for the embarked Marines. All other LPH ships would be conversions of aircraft carriers, and so had accommodation deficiencies (for example, some Marine units could not bunk together, and water distillation was insufficient to allow all personnel showers within a 24 hour period). After their retirement as amphibious warfare ships, one (Inchon) would be converted to carry minesweeping helicopters as a mine countermeasures support ship (MCS). All of these ships would be scrapped or sunk as targets by 2018. , later MCS-12 Essex-class The following LPH ships were converted Essex-class aircraft carriers, due to budget constraints with the construction of the Iwo Jima class ships. , ex-CV-21 , ex-CV-37 ex-CV-45 Casablanca-class Thetis Bay was converted from a Casablanca-class escort carrier. Under the hull designation CVHA-1, she was the prototype for the LPH concept. , ex-CVE-90, CVHA-1 Landing Platform Dock (LPD) The Landing Platform Dock (LPD) concept began as a compromise design, an attempt to build a ship with much more capability than a Landing Ship Dock (LSD) - the LPD superficially resembles an LSD with an enlarged flight deck - but without the expense of a LPH. The well deck is smaller than that of an LSD. Several of these ships were built with space dedicated for command capabilities. Two of these, LaSalle and Coronado, would be redesignated as auxiliary command ships (AGF). Raleigh-class , later AGF-3 Austin-class Cleveland-subclass [I] [I] [I] , later AGF-11 Trenton-subclass , later INS Jalashwa , later AFSB-15 (LPD-16), not built San Antonio-class The San Antonio-class were the first LPDs designed to accommodate Landing Craft Air Cushion (LCAC); two could be carried. [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [A] [P] [P] [P] (LPD-32) [P] (LPD-33) [P] Landing Ship Dock (LSD) The LSD came as a result of a British requirement during World War II for a vessel that could carry large landing craft across the seas at speed. The design was developed and built in the US for the Royal Navy and the US Navy. The first LSDs could carry 36 LCM at in a flooding well deck, the first ships with this capability. After the war they were modified with the addition of a temporary superdeck over the well deck; this could support helicopter operations, carry vehicles, or