The Delaware (SSN 791) is the 18th Virginia-class attack submarine and the seventh United States Navy ship named for the State of Delaware. The contract to build her was awarded to Northrop Grumman Newport News Shipbuilding on Dec. 22, 2008 and construction began in September 2013.

April 30, 2016 The keel was laid down for the future USS Delaware during a ceremony at Newport News shipyard.

October 20, 2018 The Pre-Commissioning Unit (PCU) Delaware was christened during a 10 a.m. EDT ceremony at the Huntington Ingalls Industries (HII) Newport News Shipbuilding in Newport News, Virginia. Dr. Jill T. Biden, the former second lady of the United States, served as sponsor of the ship. Cmdr. Brian P. Hogan is the prospective commanding officer.

December 12, PCU Delaware moved from the Module Outfitting Facility (MOF) Bay #4W to a floating dry-dock; Launched on Dec. 14.

August 30, 2019 The Delaware moored at Pier 6 on Newport News Shpyard after underway for the first time to conduct Alpha sea trials; Underway for Bravo trials from Aug. 31- Sept. 8; Underway for acceptance trials on Oct. 1.

October 7, SSN 791 made a brief stop off Naval Station Norfolk for personnel transfer; Moored at Pier 6, Newport News Shipyard on Oct. 9; Moved to Berth 5, Pier 3 in Naval Station Norfolk on Oct. 24.

October 25, Huntington Ingalls Industries (HII) Newport News Shipbuilding officially delivered the PCU Delaware to U.S. Navy.

November 8, Cmdr. Matthew Horton relieved Capt. Brian P. Hogan as CO of the Delaware during a change-of-command ceremony on board the sub.

November 26, PCU Delaware moored at Berth 2, Pier 14 on Naval Station Norfolk after a two-week underway for routine operations; Moved to Berth 2, Pier 3 on Dec. 9; Underway again on March 20.

April 4, 2020 USS Delaware was officially commissioned without a ceremony while undersea. The commissioning was previously scheduled to happen in Port of Wilmington, Del., but was cancelled for public health safety and due to restrictions on large public gatherings.

April 23, The Delaware moored at Berth 2, Pier 14 on Naval Station Norfolk; Underway again on May 18; Brief stop off Naval Station Norfolk for personnel transfer on May 19.

May 22, USS Delaware moored at Trident Wharf in Port Canaveral, Fla., for a 10-day port call; Moored at Wharf C2 on Naval Station Mayport from June 15-19; Moored at TRF's Magnetic Silencing Facility on Naval Submarine Base Kings Bay, for magnetic treatment (DEPERM), from June 20-22; Conducted degaussing runs in Mayport Basin Channel on June 23; Conducted acoustic trials off the coast of Port Everglades, Fla., from June 25-27 and June 29- July 2.

July 6, The Delaware moored at Pier 12N on Naval Submarine Base New London in Groton, Connecticut; Moved to Electric Boat shipyard for a Post Shakedown Availability (PSA) on July 15; Entered the Graving Dock #1 on July ?.

October 30, General Dynamics Electric Boat was awarded a $10,2 million modification to a previously awarded contract (N00024-09-C-2104) for the execution of USS Delaware's guaranty period. Work is expected to be completed by July 2021; Another $15 million modification was awarded on March 8, 2021.

August 16, 2021 USS Delaware undocked and moored pierside on Naval Submarine Base New London; Underway for sea trials on Sept. ?; Brief stop off Groton for personnel transfer on Sept. 26; Moored at Pier 32S on Oct. 1; Underway again on Oct. 20.

November 1, The Delaware moored at Trident Wharf in Port Canaveral, Fla., for a brief stop; Brief stop off Groton for personnel transfer on Nov. 5; Moored at Pier 6N on Nov. 8; Underway again on Nov. 29; Moored at Pier 17S on Dec. 17.

January 10, 2022 USS Delaware departed homeport for routine operations; Brief stop off Groton for personnel transfer on Jan. 14, Jan. 18, Feb. 4, 8 and 14th; Moored at Pier 31S on Feb. 17; Underway again on March 26.

March 29, USS Delaware moored at Auto & RoRo Berth in Port of Wilmington, Del., for a six-day visit to commemorate its commissioning; Returned home on April 7; Underway again on April 15.

April 24, The Delaware moored at Trident Wharf in Port Canaveral, Fla., for an 11-day port call; Moored at Trident Wharf for a brief stop on May 24; Brief stop off Groton for personnel transfer on May 27 and June 1; Brief stop off Naval Station Norfolk on June 8 and 10th; Moored at Pier 6S in Naval Submarine Base New London on June 13.

July 15, Capt. Thomas P. O’Donnell relieved Capt. Matthew R. Boland as Commander, Submarine Squadron (SUBRON) 12 during a change-of-command ceremony on board the SSN 791.

August 8, USS Delaware moored at Pier 6S on Naval Submarine Base New London after an 11-day underway for Prospective Commanding Officer (PCO) operations.

August 12, Cmdr. Robert Low relieved Cmdr. Matthew Horton as CO of the Delaware during a change-of-command ceremony on board the sub.

August 19, USS Delaware moored at Pier 31N on Naval Submarine Base New London after a four-day underway for routine operations; Underway again on Sept. 13; Moored at Pier 17N on Sept. 29; Underway again from Nov. 5-10 and Nov. 28.

December 2, USS Delaware moored at Shearwater Jetty on Canadian Forces Base (CFB) Halifax, Nova Scotia, for a four-day port visit; Brief stop off Groton for personnel transfer on Dec. 9; Returned home on Dec. 12; Underway again on Jan. 18.

January 22, 2023 The Delaware made a brief stop off the coast of Groton for personnel transfer; Brief stop off Groton again on Jan. 26 and 30th; Moored at Pier 17N on Feb. 3.

February 13, USS Delaware departed Groton for its maiden North Atlantic deployment.

From March 3-4, the Delaware conducted operations off the east coast of Reinoya Island, Norway; Moored at Grotsund Terminal in Port of Tromso, Norway, for a brief stop on June 12; Moored at Container Terminal, Port of Kollafjordur in Oyrareingir, Faroe Islands, from June 26-?.

July 20, SSN 791 made a brief stop off the coast of Keflavik, Iceland, for personnel transfer and supplies; Brief transit at the British Underwater Test and Evaluation Centre (BUTEC) range in Inner Sound, Scotland, on July 24; Brief stop off Groton to embark the Nuclear Propulsion Examination Board (NPEB) personnel, for Operational Reactor Safeguards Examination (ORSE), on Aug. 12.

August 14, USS Delaware moored at Pier 6S on Naval Submarine Base New London following a six-month deployment.

September 14, The Delaware moved from Pier 6S to Pier 31N on Naval Submarine Base New London; Underway again on Sept. 24; Brief stop off Groton on Oct. 2; Moored at Pier 32S on Oct. 4; Underway again on Oct. ?; Brief stop off Mayport, Fla., on Oct. 23.

October 2?, USS Delaware arrived off the east coast of Andros Island, Bahamas, for a Submarine Commander's Course (SCC) at the Atlantic Undersea Test and Evaluation Center (AUTEC) range; Brief stop off Mayport on Nov. 8; Brief stop off Groton on Nov. 13; Returned home on Nov. 16; Underway again on Nov. 28.

December 4, The Delaware recently arrived at the AUTEC range, off the east coast of Andros Island, Bahamas; Moored at Trident Wharf in Port Canaveral, Fla., from Dec. 8-11; Brief stop in Port Canaveral on Monday evening; Moored at Pier 32S on Dec. 14.

January 19, 2024 USS Delaware moored at Pier 17S on Naval Submarine Base New London after a three-day underway in the Narragansett Bay Op. Area; Underway again on Feb. ?; Moored at Pier 17N on March 4; Underway again on March ?.

April 1, USS Delaware moored at Berth 22 in Port Everglades, Fla., for a three-day port call; Brief stop at Berth 22 on April 4; Moored at Pier 17S in Naval Submarine Base New London for a brief stop on April 9; Moored at Pier 32N on April 13; Underway again from May 28-31 and June 10.

June 13, The Delaware made a brief stop off Naval Station Norfolk for personnel transfer; Brief stop off Norfolk again on June 19; Brief stop off Groton on June 21 and 24th; Moored at Pier 6S on June 26.

July 11, Cmdr. Jason Patton relieved Cmdr. Robert Low as the 4th CO of Delaware during a change-of-command ceremony on board the sub.

July 15, USS Delaware departed Naval Submarine Base New London for routine operations; Brief stop off Groton on July 18 and 20th; Brief stop off Naval Station Norfolk on July 30, Aug. 1 and 6th; Brief stop off Groton on Aug. 12 and 14th; Moored at Pier 32N on Aug. 17; Underway again on Sept. ?.

September 27, USS Delaware moored at Pier 31N on Naval Submarine Base New London; Underway again on Oct. 8; Brief stop off Naval Station Norfolk on Oct. 18, 21 and 25th; Brief stop off Groton on Nov. 11 and 18th; Moored at Pier 6N on Nov. 22.

December 13, USS Delaware departed Groton for a scheduled North Atlantic deployment; Brief stop off Groton for personnel transfer on Dec. 16.

February 10, 2025 USS Delaware moored at Haakonsvern Naval Base, Norway, for a five-day port call; Brief stop in Eyjafjordur Fjord, Iceland, for personnel transfer on Feb. 25; Brief stop off the west coast of Kvaloya Island, Norway, for personnel transfer on March 1.