USS Indianapolis (SSN-697)

USS Indianapolis (SSN-697)
Ship name	USS Indianapolis (SSN-697)
Country	United States
Ship class	Los Angeles-class submarine
Namesake	Indianapolis, Indiana
Builder	Newport News Shipbuilding
Laid down	25 January 1978
Launched	17 November 1979
Commissioned	14 August 1980
Decommissioned	30 January 1998
Fate	Decommissioned and stricken; reactor compartment disposed via Naval Reactors program
Displacement	6,900 long tons (submerged)
Length	362 ft (110 m)
Beam	33 ft (10 m)
Draught	31 ft (9.4 m)
Propulsion	S6G nuclear reactor; steam turbines; 1 shaft
Speed	20+ knots submerged
Complement	Officers and enlisted crew
Armament	Mark 48 torpedos; Tomahawk cruise missiles (later converted)

USS Indianapolis (SSN-697) was a Los Angeles-class nuclear-powered attack submarine commissioned in 1980 and named for Indianapolis, Indiana. Built by Newport News Shipbuilding and delivered to the United States Navy, she operated through the late Cold War and early post–Cold War period, conducting undersea warfare, deterrence support, and intelligence missions. The boat completed multiple deployments to the Atlantic Ocean, Mediterranean Sea, and other regions before decommissioning in 1998.

Design and Construction

Laid down at Newport News Shipbuilding on 25 January 1978, Indianapolis was part of the improved flight of the Los Angeles-class submarine program commissioned to counter Soviet Navy undersea advances and to operate alongside platforms such as USS Nimitz (CVN-68), USS Enterprise (CVN-65), and other carrier strike groups. Her S6G nuclear reactor plant reflected designs from Naval Reactors and engineering influences from earlier types like the Permit-class submarine and Sturgeon-class submarine. Hull form, acoustic treatment, and sonar arrays owed lineage to developments at Naval Undersea Warfare Center and influenced by research from Office of Naval Research initiatives. Launched on 17 November 1979, Indianapolis featured weapons control systems interoperable with Mark 48 torpedo inventories and later adaptations for Tomahawk standoff capability integrated with fire-control suites developed by Naval Sea Systems Command.

Operational History

Commissioned on 14 August 1980, Indianapolis entered service during heightened tensions between the United States and the Soviet Union and immediately joined operational rotations coordinated by Commander, Submarine Force Atlantic and tasking authorities including United States Sixth Fleet and United States Second Fleet. Early operations included anti-submarine warfare (ASW) exercises with NATO partners such as Royal Navy, French Navy, and Italian Navy units, often alongside surface combatants like USS Coral Sea (CV-43) and USS Biddle (CG-34). Missions emphasized surveillance of Soviet Navy ballistic missile submarine bastions, signals intelligence collection in concert with National Security Agency tasking, and torpedo and weapons certification trials with ranges such as Atlantic Undersea Test and Evaluation Center.

Indianapolis earned commendations reflecting fleet operational tempo and crew proficiency; her service intersected with incidents involving Cold War crises including tensions after the Soviet invasion of Afghanistan (1979), NATO exercises like Ocean Safari, and routine port visits to allied bases such as Gibraltar, Naples, and Rota.

Deployments and Missions

Throughout the 1980s and early 1990s Indianapolis deployed repeatedly to the Mediterranean Sea in support of United States Sixth Fleet operations, participated in multinational exercises with NATO navies, and conducted independent deployments into the North Atlantic to track Eastern Bloc submarines. Specific mission types included covert surveillance patrols directed by Commander, Submarine Force Atlantic, integrated ASW training with carriers including USS John F. Kennedy (CV-67), and participation in contingency operations related to regional crises such as tensions in the Persian Gulf and security patrols associated with sanctions regimes enforced by United Nations resolutions.

During the post–Cold War era Indianapolis also supported evolving missions: precision strike preparation with Tomahawk integration, joint exercises with Royal Australian Navy and Canadian Forces maritime units, and port visits to partner bases in Souda Bay, Haifa, and La Maddalena. The submarine’s operational history included participation in submarine force readiness evaluations administered by Commander, Submarine Forces and safety inspections led by Naval Safety Center.

Upgrades and Modernization

Indianapolis underwent periodic overhauls at Norfolk Naval Shipyard and Newport News Shipbuilding to sustain combat systems, acoustic quieting, and habitability upgrades. Mid-life modernization work incorporated improvements to sonar suites influenced by developments at Naval Undersea Warfare Center and the adoption of digital fire-control components planned by Naval Sea Systems Command. Weapon system updates enabled compatibility with newer torpedo guidance packages such as those sourced from Raytheon and long-range cruise strike ordnance like the Tomahawk, reflecting doctrine shifts articulated by Chief of Naval Operations guidance.

Electronics and navigation refits included inertial navigation system replacements similar to systems fielded on sister boats, communications upgrades to link with Naval Communications networks, and maintenance on the S6G reactor overseen by Bureau of Ships-era procedures codified in Naval Reactors protocols.

Decommissioning and Fate

As post–Cold War force reductions and budget realignment executed under directives influenced by the Base Realignment and Closure Commission and fleet force structure reviews, Indianapolis was decommissioned and stricken from the Naval Vessel Register on 30 January 1998. Her deactivation process followed Naval Nuclear Propulsion Program procedures: defueling, reactor compartment removal, and disposal overseen by Puget Sound Naval Shipyard and programs established by Nuclear Regulatory Commission-adjacent authorities. The hull and remaining structure were recycled under the Navy’s ship recycling efforts while the reactor compartment was sealed and disposed of in accordance with protocols used for other Los Angeles-class units. Indianapolis’ legacy persists in ties to the city of Indianapolis, Indiana and in archival records maintained by institutions such as the Naval Historical Center and regional museums.

Category:Los Angeles-class submarines Category:Ships built in Newport News, Virginia Category:1980 ships