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Wasp class

Amphibious assault ship

Wasp class ship

The Wasp class amphibious assault ships can also function as light aircraft carriers



Entered service 1989
Crew 1 208 men
Sea endurance ?
Dimensions and displacement
Length 253.2 m
Beam 31.8 m
Draught 8.1 m
Displacement, standard ?
Displacement, full load 41 150 tons
Propulsion and speed
Speed 22 knots
Range 17 594 km at 18 knots
Steam turbines twogeared steam turbines delivering 70 000 shp
Cargo
Troops 1 900 men
Vehicles 61 AAVs
Cargo ?
Landing craft
Landing craft 3 x LCACs or 12 x LCMs
Aircraft
Fixed wing 6 - 8 x AV-8B Harrier II
Helicopters AH-1W Super Cobra, CH-46 Sea Knight, CH-53 Sea Stalion, UH-1N Twin Huey, V-22 Osprey
Armament
Artillery 4 x 25-mm Mk.38 guns, 3 x Vulcan Phalanx 20-mm CIWS
Missiles 2 x Raytheon GMLS Mk.29 octuple surface-to-air missile launchers for Sea Sparrow missiles, 2 x RAM launchers for RIM-116A missiles

 

   The Wasp class ships are the largest amphibious assault vessels in the world, providing the US Navy with an unrivalled ability to attack hostile shores around the world. The are the first ships specifically designed to operate both the AV-8B Harrier II and a complement of LCAC hovercraft. The last three of the class to be completed have cost an average of $750 million each. The US plans for a 12-strong ARG (Amphibious Ready Group to be deployed by 2010, when the first Tarawa class vessel will be 35-years-old.

   The Wasp class is a follow-on from the Tarawa class and its ships share the same basic hull and engineering plant. However, the bridge is two decks lower than the LHAs (Landing Helicopter Amphibious) and the command, control and communications centers are inside the hull where they less easy to disable. To facilitate landing and recovery operations, the ships can ballast some 15 000 tons of sea water for trimming.

   Capable of embarking a 2 000-strong marine expeditionary unit, the Wasp class can land its troops on the beach using its own landing craft, or deliver them inland via helicopters (a manoeuvre known as vertical envelopment). Each Wasp class can accommodate up to three LCACs or twelve LCMs in the 81 m x 15.2 m well deck. In total, 61 AAVs (Amphibious Assault Vehicles - the AAV7A1) can be shipped aboard, 40 stowed in the well deck and 21 in the upper vehicle storage area.

   The flight deck has nine landing spots for helicopters and up to 42 CH-46 Sea Knights can be operated; the class can also deploy AH-1 SeaCobra attack helicopters or other transports such as the CH-53E Super Stallion, UH-1N Twin Huey or the multi-purpose SH-60B Seahawk. The Wasp class can operate six to eight AV-8B Harrier IIs in the combat role, but can support up to 20. There are two aircraft elevators, one amidships on the port side, the other to starboard, abaft the island. When the ships pass through the Panama Canal these lifts have to be folded inboard.

   The composition of the air group depends on the mission. The Wasp class can function as aircraft carriers, operating 20 AV-8Bs in the sea control role, plus six ASW helicopters. For amphibious assault, a typical group consists of six AV-8Bs, four AH-1W attack helicopters, 12 CH-46 Sea knights, nine CH-53 Sea Stallions or Super Stallions and four UH-1N Twin Hueys. Alternatively, it can also operate 42 CH-46s.

   The Wasp-class ships are designed to carry a balanced force of combat vehicles, including five M1 Abrams main battle tanks, 25 AAV7A1 armored personnel carriers, eight M198 155-mm towed guns, 68 lorries and a dozen or so other support vehicles. They can transport and land ashore all manner of equipment and vehicles. Monorail trains moving at up to 183 m per minute deliver cargo from the storage areas to the well deck, which opens to the sea through gates in the stern.

   Each ship also features a 600-bed hospital with six operating theatres, so reducing an amphibious task force's dependence on medical facilities ashore.

   The Wasp class has been replacing the older LHAs since the mid-1990s. USS Bataan was built by pre-outfitting and modular construction techniques. Subassemblies were brought together to produce five hull and superstructure modules. These modules were then joined together on land. The result of this construction technique was that the ship was three-quarters complete on launch. Bataan is the first amphibious assault ship designed from the outset to accommodate female personnel, both in the crew and Marine contingent. Full accommodation for up to 450 female officers, enlisted personnel and troops is provided on the vessel.

   The last ship of the Wasp class, the USS Makin Island, became a base for a new design of America class amphibious assault ships. Once operational the America class ships will replace the ageing Tarawa class vessels.

 

Name Laid down Launched Commissioned Status
USS Wasp (LHD-1) 1985 1987 1989 active, in service

USS Essex (LHD-2)

1989 1991 1992 active, in service

USS Kearsarge (LHD-3)

1990 1992 1993 active, in service

USS Boxer (LHD-4)

1991 1993 1995 active, in service

USS Bataan (LHD-5)

1994 1996 1997 active, in service

USS Bonhomme Richard (LHD-6)

1995 1997 1998 active, in service

USS Iwo Jima (LHD-7)

1997 2001 2001 active, in service

USS Makin Island (LHD-8)

2004 2006 2009 active, in service

 

 
Wasp class ship

Wasp class ship

Wasp class ship

Wasp class ship

Wasp class ship

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