Pennsylvania-class battleship
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| Pennsylvania-class battleship | |
|---|---|
| Name | Pennsylvania-class battleship |
| Caption | USS Pennsylvania (BB-38) underway, 1920s |
| Country | United States |
| Type | Battleship |
| Service | Commissioned 1916–1948 |
| Length | 608 ft (185 m) |
| Beam | 97 ft (30 m) |
| Draft | 28 ft (8.5 m) |
| Displacement | 32,000–32,400 long tons (standard) |
| Armament | 14 × 14 in (356 mm), 12 × 5 in (127 mm) |
| Armor | 12 in (305 mm) belt |
| Propulsion | Steam turbines |
| Speed | 21 knots |
| Ships | USS Pennsylvania (BB-38), USS Arizona (BB-39) |
Pennsylvania-class battleship The Pennsylvania-class battleship comprised two United States Navy dreadnoughts, USS Pennsylvania (BB-38) and USS Arizona (BB-39), authorized under the Naval Act of 1916 and completed during the years surrounding World War I. Designed to project American sea power in the Pacific Ocean and the Atlantic Ocean, the class combined heavy 14-inch gun battery firepower with improved armor layout influenced by earlier Nevada-class battleship and Wyoming-class battleship designs. Both ships served through interwar Washington Naval Treaty limitations and extensive World War II operations, with Arizona famously lost at Pearl Harbor and Pennsylvania surviving to support amphibious campaigns in the Pacific Theater.
Design and development
Design work for the Pennsylvania class began amid debates in the United States Congress and the Bureau of Construction and Repair (BuC&R) over caliber, belt protection, and speed in response to foreign programs such as the King George V proposals and developments in the Imperial Japanese Navy. Influences included lessons from the Battle of Jutland, the Dreadnought revolution, and liaison with the Royal Navy and the United States Naval War College, prompting BuC&R engineers and naval architects to prioritize balanced secondary batteries modeled after the Pennsylvania Railroad-era industrial baseline and the New York Navy Yard construction practices. Congressional proponents including members of the House Naval Affairs Committee and advocates from the Navy League of the United States pushed for displacement and armament that would ensure parity with Imperial German Navy dreadnoughts. The resulting ships adopted features from contemporary capital ships, evolving under supervision by figures tied to the Office of the Chief of Naval Operations and policy debates that culminated in procurement during the Wilson administration.
Description and armament
Pennsylvania-class hull and armor schemes reflected innovations from the Nevada-class layout, including an all-or-nothing armor principle adopted by Admiral William S. Sims proponents and informed by tests at Naval Proving Ground, Dahlgren. Main battery comprised twelve 14-inch/45 caliber guns in four triple turrets, echoing trends set by British Royal Navy designs and contemporaneous Imperial Japanese Navy dreadnoughts; secondary battery included twelve 5-inch/51 caliber guns for anti-destroyer defense and anti-torpedo boat actions akin to armaments on USS New Mexico (BB-40). Fire-control systems integrated technology from the Sperry Gyroscope Company and the Mark I Fire Control System lineage, incorporating rangefinders of the type used by HMS Malaya (1915) and director-control towers similar to equipment on USS Nevada (BB-36). Propulsion relied on steam turbines fed by oil-fired boilers supplied by contractors tied to the Bethlehem Steel industrial network and the Fore River Shipyard supply chain, producing cruising ranges compatible with deployments to Guam and Philippine Islands bases. Armor thicknesses and torpedo defense systems drew on studies from the Naval War College and the General Board of the United States Navy, with underwater protection influenced by HMS Erin trials.
Construction and ships
USS Pennsylvania (BB-38) was laid down at William Cramp & Sons in Philadelphia and launched under the sponsorship of political figures connected to Pennsylvania (state), while USS Arizona (BB-39) was built at Brooklyn Navy Yard with ties to contractors servicing the New York Shipbuilding Corporation network. Both hulls were completed during the Woodrow Wilson presidency and commissioned into the fleet with ceremonies involving dignitaries from Secretary of the Navy Josephus Daniels’ era. Shipyard labor disputes and industrial mobilization intersected with the United States entry into World War I timeline, though neither ship saw combat in that conflict. The class’ construction intersected with contemporaneous projects including South Dakota-class battleship (1920) proposals and influenced later Colorado-class battleship considerations.
Operational history
During the interwar period, Pennsylvania and Arizona participated in fleet exercises with the United States Fleet and made goodwill visits to South America, Australia, and Panama Canal Zone ports, engaging with foreign naval delegations from the Imperial Japanese Navy and the Royal Australian Navy. Arizona became flagship of the Battle Fleet and underwent peacetime training cruises that connected her to Admiral William V. Pratt and fleet staff operating from Naval Station San Diego. At the outset of World War II in the Pacific, Arizona was stationed at Pearl Harbor and was destroyed in the Japanese Attack on Pearl Harbor on 7 December 1941, with senior officers and enlisted sailors commemorated by memorials later established by the National Park Service and the USS Arizona Memorial at Joint Base Pearl Harbor–Hickam. Pennsylvania survived the attack with mild damage and proceeded to undergo repairs and modernizations before deploying across the Central Pacific Campaign, supporting amphibious landings such as those at Iwo Jima and Okinawa by delivering naval gunfire in coordination with Amphibious Forces and Marine Corps units. Pennsylvania also provided anti-aircraft defense against Kamikaze attacks while escorting carrier task forces including elements of the Fast Carrier Task Force.
Modernization and refits
Between World War I and World War II, both ships received incremental updates driven by treaty limitations from the Washington Naval Treaty and doctrinal shifts influenced by the London Naval Treaty. Major reconstruction programs in the 1920s–1930s on Pennsylvania addressed fire-control modernization tied to developments at the Naval Research Laboratory and improvements to superstructure and anti-aircraft batteries comparable to refits on USS West Virginia (BB-48). Arizona’s pre-war refit improved magazine protection and anti-aircraft armament, but she retained original main-battery layout until 1941. Pennsylvania underwent more extensive wartime refits including installation of additional 5-inch dual-purpose batteries and improved radar from Radiolocation pioneers, echoing similar upgrades installed on USS Tennessee (BB-43) and other contemporaries; these refits were performed at facilities including the Pearl Harbor Navy Yard and the Puget Sound Navy Yard. Hull alterations and propulsion overhauls reflected techniques developed at the Navy Yard, Philadelphia and incorporated wartime damage-control lessons codified by the Bureau of Ships.
Legacy and assessment
The Pennsylvania class is assessed by historians and naval analysts in comparison to Nevada-class battleship and California-class battleship contemporaries as representing an evolutionary step in United States Navy dreadnought design, notable for its service longevity and for Arizona’s symbolic role in American wartime memory preserved by the National Park Service and commemorated in works by historians affiliated with the Naval Historical Center. Naval theorists cite the class when discussing interwar limits such as the Washington Naval Treaty and the transition from battleship-centric doctrine to carrier-led operations exemplified by events including the Battle of Midway. Surviving archival material at the National Archives and Records Administration and studies published by the Naval Institute Press continue to evaluate armor schemes, damage-control outcomes, and crew experiences recorded by veterans associated with the Battleship Division 1 and Battleship Division 4. The Pennsylvania class remains referenced in museum exhibits at Mare Island Naval Shipyard-era displays, naval cemeteries, and memorial literature that connect industrial-era shipbuilding to twentieth-century maritime strategy.