Amphibious assault ship
Amphibious assault ships are landing ships that carry helicopters for the transportation of landing troops and equipment. It is also called helicopter landing transportation ship. The main use of helicopters to transport landing troops for vertical landing, in order to improve the suddenness, rapidity and mobility of landing operations.
The ship's flight deck can take off and land 7~8 helicopters at the same time. Below the flight deck is a hangar and landing vehicle storage. The helicopters and vehicles are transported to the flight deck by the elevator in the hangar, and there is a passage from the landing soldier's cabin to the boarding area.
The ship also has a command center, navigation equipment and more complete medical facilities. The United States built the "Sulphur Island" amphibious assault ship, full load displacement of 18,300 tons, the maximum speed of 23 knots, can carry 20 helicopters, 4 vertical, short take-off and landing aircraft, the ship is also equipped with air-to-air missiles and 76-mm guns, but also can carry 2,000 landings bing and weapons and equipment.