To compete against the Japan Maritime Self-Defense Force's Izumo-class helicopter destroyers, China is planning to build a new class of amphibious assault ship with a displacement of 40,000 tons, according to Kanwa Defense Review, a Canada-based Chinese-language military magazine.
China displayed the model of its 40,000-ton super large amphibious assault ship, known as M1, during the Sixth International Offshore Engineering Technology and Equipment Exhibition held in Beijing in April. Unlike the 28,000-ton Izumo-class, designed with five helicopter landing spots on its flight deck, the M1 has six. While the Izumo can carry a total number of 14 aircraft, how many the M1 can carry remains a mystery.
The USA has the Wasp class is a class of Landing Helicopter Dock (LHD) amphibious assault ships operated by the United States Navy. Based on the Tarawa class, with modifications to operate more advanced aircraft and landing craft, the Wasp class is capable of transporting almost the full strength of a United States Marine Corps Marine Expeditionary Unit (MEU), and landing them in hostile territory via landing craft or helicopters. All Wasp-class ships were built by Ingalls Shipbuilding, at Pascagoula, Mississippi, with the lead ship, USS Wasp, commissioned on 29 July 1989. Eight Wasp-class ships were built, and as of 2013, all eight are active.
Each Wasp class ship has a displacement of 40,500 long tons (41,150 t) at full load, is 831 feet (253.2 m) long, has a beam of 104 feet (31.8 m), and a draft of 27 feet (8.1 m). For propulsion, most of the ships are fitted with two steam boilers connected to geared turbines, which deliver 70,000 shaft horsepower (33,849 kW) to the two propeller shafts