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| AP-71 | |
|---|---|
| Name | AP-71 |
| Type | Transport ship |
| Introduced | 1943 |
| Manufacturer | Bethlehem Steel |
| Operator | United States Navy |
| Complement | 60 |
| Capacity | 2,500 troops |
| Length | 520 ft |
| Beam | 71 ft |
| Displacement | 11,500 long tons |
| Propulsion | Steam turbines |
| Speed | 18 kn |
AP-71
AP-71 was a mid-20th century troop transport commissioned by the United States Navy during World War II. Designed to move large numbers of personnel between theaters, AP-71 supported major amphibious operations, convoys, and postwar repatriation efforts. The ship linked strategic hubs such as Norfolk Naval Shipyard, Pearl Harbor Naval Base, and San Francisco Bay to contested regions including the Mediterranean Sea and the South Pacific Theater.
Conceived in response to the accelerated mobilization after the Attack on Pearl Harbor, AP-71 emerged from design discussions involving United States Maritime Commission planners, naval architects at Bethlehem Steel, and logistic officers from the Office of Naval Operations. Drawing on precedents set by the USS West Point (AP-23), the design emphasized rapid personnel embarkation and debarkation to support operations like Operation Torch and Operation Overlord. Naval engineers incorporated lessons from the Battle of the Atlantic convoy escort requirements and the amphibious doctrine promoted by doctrine writers at Naval War College. Shipyards adapted standardized hull forms from the Liberty ship and Victory ship programs, while incorporating improvements inspired by the Cleveland-class cruiser and troopship refits seen at Newport News Shipbuilding.
Initial blueprints were reviewed by planners who had worked on the Hyde Park Agreement-era logistics coordination and by officers formerly assigned to the USS West Point (AP-23) and USS George Washington (AP-12). The resulting hull balanced range, carrying capacity, and survivability. Designers referenced materials handled in wartime procurement conferences with representatives from War Production Board and Office of Price Administration to secure steel, boilers, and auxiliary equipment. The ship’s superstructure and davit arrangements were influenced by transfer drills developed after the Dieppe Raid and Guadalcanal Campaign.
AP-71 measured approximately 520 feet overall with a beam near 71 feet and a draft suitable for major harbors including Liverpool and Marseilles. Powered by steam turbines feeding twin screws, the propulsion plant resembled machinery types used in the SS United States and certain C3-class transports, delivering a service speed near 18 knots to match convoy pacing seen in the North Atlantic convoy routes. Boilers and turbines were manufactured under contracts overseen by Bethlehem Steel and assembled with components inspected by officials from Bureau of Ships.
The troop capacity, arranged in tiered berthing compartments, allowed for roughly 2,500 embarked personnel supported by a complement of about 60 officers and enlisted ratings drawn from naval personnel lists coordinated with Bureau of Naval Personnel. Defensive armament comprised dual-purpose guns and anti-aircraft mounts patterned after layouts used on the Haskell-class attack transport, enabling coordination with escorts such as Flower-class corvettes and Destroyer Escorts. Communications suites integrated radio and radar equipment similar to sets procured by Naval Electronics Laboratory and used at Admiralty House liaison points.
Cargo handling relied on cargo booms and hatches comparable to those standardized in the Victory ship conversions. Damage control features reflected lessons from the USS Indianapolis (CA-35) loss and innovations promoted by Chief of Naval Operations directives on survivability and watertight integrity.
Commissioned into service during the height of World War II, AP-71 participated in transatlantic and transpacific troop movements, making port calls at New York Harbor, Liverpool, Gibraltar, Naples, Pearl Harbor, and Manila Bay. The ship supported staging for Operation Husky and later rotations associated with Operation Dragoon. Crews coordinated embarkation with army elements drawn from units that had served in North Africa Campaign formations and airborne contingents trained for Operation Market Garden-style insertions.
In the Pacific, AP-71 shuttled reinforcements for campaigns connected to Leyte Gulf and Okinawa logistics chains, operating alongside hospital ships and escort carriers such as those commissioned at Puget Sound Navy Yard. After V-J Day the vessel joined the Operation Magic Carpet fleet repatriating service members to ports including San Francisco and Seattle. Postwar the ship supported occupation deployments to Yokohama and discharge rotations coordinated with War Department demobilization offices.
As wartime needs evolved, AP-71 underwent refits producing variant configurations. A troop-to-hospital conversion paralleled modifications made to other transports following the Battle of Iwo Jima casualty rates, adopting features used on hospital auxiliaries like USS Comfort (AH-6). Cargo-optimized refits resembled reworking patterns implemented on Maritime Commission hulls converted to cargo transports and troop/cargo combinations. Postwar, a planned commercial passenger variant echoed conversion practices seen on ships sold to companies such as American Export Lines and United States Lines.
Primary operator was the United States Navy under the administrative control of the Commandant of the Navy Yard where she was homeported. Operational tasking came from the United States Pacific Fleet and United States Atlantic Fleet as campaigns required. Allied coordination involved port authorities and liaison officers from British Admiralty, Royal Australian Navy, and French Navy when calling at coalition-controlled harbors.
AP-71 experienced several peacetime and wartime incidents typical of large transports. A collision while maneuvering in fog near Scapa Flow necessitated repairs at Rosyth Dockyard, echoing earlier navigational risks recorded in the Battle of the North Cape era. A wartime air raid near Naples caused topside damage but no total loss, invoking damage-control procedures refined after the Pearl Harbor attacks. Postwar grounding in a channel approaching Manila Bay required drydocking at Subic Bay for hull corrections.