USS Indianapolis

USS Indianapolis
Ship name	USS Indianapolis (CA-35)
Ship caption	USS Indianapolis underway, 1938
Ship country	United States
Ship commissioned	15 November 1932
Ship decommissioned	30 April 1945 (sunk)
Ship builder	New York Shipbuilding Corporation
Ship launched	7 November 1931
Ship owner	United States Navy
Ship class	Portland-class heavy cruiser
Ship displacement	9,800 tons (standard)
Ship length	610 ft (186 m)
Ship beam	66 ft (20 m)
Ship propulsion	Steam turbines, 8 boilers
Ship speed	32.7 knots
Ship complement	~1,200 officers and enlisted
Ship armament	9 × 8 in (203 mm) guns; 8 × 5 in (127 mm) guns; anti-aircraft battery

USS Indianapolis

USS Indianapolis was a Portland-class heavy cruiser of the United States Navy noted for delivering critical components of the Manhattan Project and for her sinking in July 1945 which produced one of the worst losses of life at sea in United States naval history. The ship served in multiple Pacific War operations, earning numerous battle stars, before being torpedoed by a Imperial Japanese Navy submarine and sinking rapidly, precipitating a delayed rescue and extensive post-war controversy.

Construction and Commissioning

Laid down at New York Shipbuilding Corporation in Camden, New Jersey, Indianapolis was built under the 1928 naval construction programs alongside other heavy cruisers such as USS Portland (CA-33) and USS Northampton (CA-26). Launched on 7 November 1931 and sponsored during a ceremony attended by figures from Navy Department (United States) and naval societies, she was commissioned on 15 November 1932 under the command of Capt. Claude C. Bloch and entered service amid interwar fleet exercises involving units from Battle Fleet (United States Pacific Fleet) and cruiser divisions that later fought in the Pacific Theater of World War II. Her Portland-class design reflected treaty-era limits set by the Washington Naval Treaty and the London Naval Treaty while incorporating armor and armament comparable to contemporaneous heavy cruisers like HMS Exeter and IJN Myōkō.

World War II Service

During the Pearl Harbor attack period and after, Indianapolis operated with United States Pacific Fleet task forces, participating in raids and carrier escort missions tied to operations such as the Gilbert and Marshall Islands campaign and the Marianas campaign. She provided naval gunfire support for amphibious landings at Saipan and Tinian, engaged in raids associated with Task Force 58 under admirals including Chester W. Nimitz and William F. Halsey Jr., and conducted shore bombardment against Iwo Jima and Okinawa approaches. In 1945 Indianapolis was chosen for a highly classified mission transporting assembled components of the Little Boy atomic bomb—recovered and documented after transfer from Los Alamos National Laboratory—from Tinian to San Francisco via Guam and Leyte, operating under directives from the BuShips and Joint Chiefs of Staff.

Sinking and Immediate Aftermath

On 30 July 1945, while steaming alone from Guam to Leyte after the Tinian mission, Indianapolis was struck by two torpedoes from the Japanese submarine I-58, commanded by Mochitsura Hashimoto. The explosions caused catastrophic flooding and structural failure; she sank within minutes in the Philippine Sea southeast of Okinawa. Survivors were cast into open ocean waters swarming with fuel, debris, and hostile marine life, with lifeboats and life rafts reduced by rapid sinking and heavy seas. The loss occurred during the closing weeks of the World War II Pacific Theater, shortly before the Surrender of Japan.

Rescue, Survivors, and Casualties

Initial search-and-rescue actions were delayed because Indianapolis's non-arrival at Leyte Gulf was neither reported nor immediately acted upon; radio silence and operational secrecy contributed to the delay. For four days, approximately 900 of the crew were left in the water exposed to dehydration, saltwater, exposure, injuries, and shark attacks, while only about 316 officers and men were ultimately rescued by the USS Cecil J. Doyle and other vessels alerted by a routine patrol aircraft from VP-2. Roughly 880 crew members were lost, making the sinking one of the deadliest maritime disasters in United States naval history. Post-rescue medical treatments took place at naval hospitals including Naval Hospital (San Diego) and facilities near Okinawa and Leyte.

Investigations and Court-Martial Proceedings

A Navy court of inquiry convened after the sinking, followed by formal court-martial proceedings that controversially targeted the Indianapolis's captain, Capt. Charles B. McVay III, for failing to zigzag and culpability in the ship's loss. The court-martial, presided over within the Judge Advocate General's Corps (United States Navy), convicted McVay on a single charge of hazarding his ship; he was later administratively reprimanded. Subsequent reviews, testimony from Hashimoto at hearings, and investigations by Congress and Naval Historical Center historians raised questions about command decisions, convoy routing, and failures in Naval Communications. Decades later, efforts led by survivors, members of Congress such as Betsy A. Watson supporters, and public campaigns prompted the United States Navy to revisit McVay's record; in 2000 the Secretary of the Navy, Richard Danzig, exonerated McVay by overturning the conviction, and in 2001 Congress passed resolutions honoring the crew.

Legacy, Memorials, and Cultural Impact

The disaster generated enduring public attention, remembrance, and representation in books, documentaries, and dramatizations such as works by authors Robert Kurson and accounts in National Geographic. Memorials include plaques and monuments at locations like Indianapolis, Plymouth Rock? — (editorial correction: see local memorial placements), the National Museum of the United States Navy, and a dedicated memorial at Crown Hill Cemetery where many crew are commemorated. The incident influenced naval operational protocols, search-and-rescue doctrine, and the role of survivor advocacy in reevaluating military justice, with coverage in media outlets including The New York Times and CBS News. The story has permeated popular culture, appearing in films, television documentaries, and discussions in naval historiography alongside studies of Manhattan Project logistics and late-war Pacific operations.

Category:Portland-class cruisers Category:United States Navy shipwrecks in the Pacific Ocean Category:World War II shipwrecks of the Philippines