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| Landing Platform, Helicopter (LPH) | |
|---|---|
| Name | Landing Platform, Helicopter |
| Operator | Various navies and marine corps |
| Built | 1940s–1990s |
| Type | Amphibious assault ship (helicopter carrier) |
| Displacement | Typically 10,000–40,000 tonnes |
| Length | Typically 150–260 m |
| Aircraft | Numerous helicopter and VTOL types |
Landing Platform, Helicopter (LPH) Landing Platform, Helicopter (LPH) denotes a class of amphibious assault ships purpose-built to embark, transport, and deploy rotary-wing aircraft and associated assault forces. Derived from earlier aircraft carrier and amphibious warfare ship concepts, LPH designs emphasize full-length flight decks, hangar space, and well-integrated troop accommodations to support air assault operations, expeditionary warfare missions, and humanitarian aid tasks.
LPH designs blend elements of aircraft carrier architecture, destroyer engineering standards for survivability, and dock landing ship logistics for embarkation. Typical hull forms draw from light cruiser or fleet carrier precedents to balance speed and seakeeping with amphibious payload. The flight deck is configured for cyclic operations by Sikorsky, Westland, Bell, and Mil Mi-8 family helicopters, with hangars served by aircraft elevators derived from Essex-class aircraft carrier practice. Troop accommodations, command-and-control centers, medical facilities, and vehicle stowage echo arrangements found aboard Auckland-class and HMS Albion (1962)-type vessels. Propulsion ranges from steam turbines influenced by Royal Navy engineering to gas turbines pioneered by United States Navy designs and combined diesel-electric systems used by Italian Navy shipbuilders.
LPH doctrine centers on vertical envelopment and power projection. Forces embarked typically include marine corps units, commando formations, and special operations detachments trained for heliborne insertion into contested littoral zones. Naval planners integrate LPH units into amphibious task force structures alongside dock landing ship and landing helicopter dock vessels, guided by concepts refined in Korean War, Suez Crisis, Falklands War, and Gulf War analyses. Commanders employ LPH assets for non-combatant evacuation operations, disaster relief, and as afloat forward staging bases supporting aircraft from Harrier and AV-8B Harrier II lines in some navies. Tactical doctrines reference combined-arms coordination with destroyer escorts, frigate screens, and submarine reconnaissance to secure approach corridors.
Several notable LPH classes emerged in the Cold War and post–Cold War eras. The Royal Navy adapted converted carriers such as HMS Hermes (R12) toward helicopter assault roles; the United States Navy developed purpose-built Iwo Jima-class amphibious assault shipes designated LPH, while later Tarawa-class amphibious assault ships and Wasp-class amphibious assault ships expanded aviation capability. Other navies produced variations: Japanese Maritime Self-Defense Force helicopter carriers like JS Hyūga (DDH-181) reinterpret the concept, and the French Navy fielded ships in the lineage of Mistral-class amphibious assault ship developments. Export and regional variants include designs by Navantia, Babcock International, and Sembcorp Marine, adapted for Royal Australian Navy, Republic of Korea Navy, and Brazilian Navy requirements.
LPH platforms participated in major operations across the late 20th and early 21st centuries. The United States Navy Iwo Jima-class supported Vietnam War helicopter operations, while Royal Navy LPH conversions were central to Falklands War amphibious assaults involving Royal Marines and Harrier air support. LPH and derivative vessels provided critical capacity during Operation Restore Hope, Operation Iraqi Freedom, and multinational UN humanitarian missions. Regional navies deployed helicopter carriers for disaster response after events such as the 2004 Indian Ocean earthquake and tsunami and Typhoon Haiyan (Yolanda). Throughout deployments, LPHs often operated alongside carrier strike groups, amphibious ready groups, and multinational task forces.
LPH aviation complements include medium and heavy-lift helicopters, attack and utility rotorcraft, and occasionally short takeoff/vertical landing (STOVL) fixed-wing types. Common embarked types are Sikorsky UH-60 Black Hawk, CH-47 Chinook, Westland Sea King, AgustaWestland AW101, and Bell AH-1 Cobra derivatives. Flight decks provide multiple landing spots, deck handling evolved from catapult-less marine aviation practices, and hangars accommodate maintenance with support from embarked aviation squadrons like Helicopter Maritime Strike Squadron equivalents. Aviation support systems include aviation fuel facilities conforming to JP-5 standards, secure ammunition stowage based on NATO regulations, and managed flight control modeled on deck landing control officer procedures.
Although primarily aviation platforms, LPHs carry self-defense suites integrating point-defense and area-defense systems. Typical armament comprises close-in weapon systems modeled on Phalanx CIWS technology, surface-to-air missile batteries such as Sea Sparrow variants or Aster family installations, and decoy launchers derived from Nulka and Chaff countermeasures. Electronic warfare systems include radar warning receivers and electronic support measures developed by contractors linked to BAE Systems, Raytheon, and Rafael Advanced Defense Systems. Defensive doctrine pairs these systems with escorting frigate and destroyer screens for layered protection.
LPH platforms influenced modern amphibious warfare, shaping subsequent landing helicopter dock and amphibious assault ship designs and contributing to doctrines of expeditionary maneuver. Their legacy persists in hybrid carriers like Izumo-class helicopter destroyer conversions and in doctrine codified by institutions such as the NATO Allied Maritime Command. LPH concepts fostered interoperability among allied navies, advanced rotary-wing tactics, and expanded humanitarian response capabilities, leaving a lasting imprint on 20th- and 21st-century naval operations.
Category:Amphibious warfare vessels