The contract to build the fifth Virginia-class submarine sub was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Conn., on Aug. 14, 2003. She is the fourth ship of the U.S. Navy to be named for the state of New Hampshire. The construction of SSN 778 began in January 2004.

April 30, 2007 The keel was laid for the PCU New Hampshire at GDEB’s Quonset Point facility in North Kingstown, R.I. The ship's sponsor is Cheryl McGuinness of Portsmouth, N.H., the widow of Thomas McGuinness, co-pilot of American Airlines Flight 11, who died in the September 11, 2001 attacks when the jet was flown into the North Tower of the World Trade Center.

June 21, 2008 The Pre-Commissioned Unit (PCU) New Hampshire was christened during an 11:00 a.m. EDT ceremony at Electric Boat in Groton. Cmdr. Michael J. Stevens is the prospective commanding officer. She is the first Virginia-class submarine to be built in four sections, a noteworthy improvement from the 10 required for the lead ship.

July 29, The New Hampshire departed Groton, Conn., for the first time, for Alpha sea trials.

October 25, USS New Hampshire (SSN 778) was commissioned during a ceremony at the Portsmouth Naval Shipyard in Kittery, Maine. This will mark the first time since 1996 that the U.S. Navy has commissioned two submarines of the same class in the same year. USS North Carolina (SSN 777) was commissioned in May.

May 15, 2009 The New Hampshire is currently off the coast of United Kingdom participating in multinational exercise Joint Warrior.

May 20, The Virginia-class attack submarine arrived in Haakonsvern Naval Base in support of 100th Anniversary of the Royal Norwegian Navy submarine force.

June 4, SSN 778 pulled into Rota, Spain, for a routine port call.

July 22, USS New Hampshire returned to Naval Submarine Base New London after a maiden underway period. She is the first Virginia-class submarine to deploy in support of operations in the U.S. European Command Area of Responsibility.

April 22, 2010 Cmdr. John E. McGunnigle, Jr., relieved Cmdr. Michael J. Stevens as CO of the New Hampshire during a change-of-command ceremony at Groton, Conn.

March 10, 2011 USS New Hampshire departed homeport to participate in Ice Exercise (ICEX) 2011, about 160 miles from the north coast of Alaska, near Prudhoe Bay.

March 13, 2012 USS New Hampshire departed Groton, Conn., for a scheduled deployment.

April 2, The New Hampshire pulled into HMNB Clyde at Faslane, Scotland, for a routine port call.

April 20, The fifth Virginia-class attack submarine recently arrived at Haakonsvern Naval Base for a routine port visit to Bergen, Norway.?

May 12, USS New Hampshire pulled into Portsmouth, England, for a three-day port call.?

June 11, SSN 778 recently moored at HM Naval Base Clyde for another routine port visit to Faslane.?

August 24, USS New Hampshire arrived in HMNB Gibraltar for a scheduled port visit to British overseas teritory.

September 13, USS New Hampshire returned to homeport after a six-month deployment in the U.S. 6th Fleet Area of Responsibility.

December 17, Cmdr. Sean D. Fujimoto relieved Cmdr. John E. McGunnigle, Jr., as CO of the New Hampshire during a change-of-command ceremony at the Naval Submarine Library and Museum in Groton.

February 11, 2014 USS New Hampshire departed NSB New London for a scheduled North Atlantic deployment.

February 22, SSN 778 moored at Middle Slip Jetty (MSJ) North in HMNB Portsmouth, England, for a three-day port call.

August 13, USS New Hampshire returned to Groton after a six-month deployment. The sub also made port calls to Haakonsvern, Norway; and Faslane, Scotland.

April 13, 2015 Cmdr. Jason E. Weed relieved Cmdr. Sean D. Fujimoto as the 4th CO of New Hampshire during a change-of-command ceremony on board the sub at Naval Submarine Base New London.

May 4, USS New Hampshire moored outboard the USS Cole (DDG 67) at Berth 21 in Port Everglades, Fla., for a six-day port visit to participate in annual Fleet Week celebration.

July 30, Capt. John E. McGunnigle, Jr., relieved Capt. James P. Waters, III as Commander, Submarine Squadron (SUBRON) 4 during a change-of-command ceremony on board the New Hampshire at NSB New London.

October 20, The New Hampshire departed homeport to conduct routine training in the U.S. Fleet Forces Command AoO; Moored at Naval Station Mayport, Fla., from Nov. ?-14; Returned to Groton on Nov. 24.

May ?, 2016 USS New Hampshire departed Groton for a scheduled North Atlantic deployment.

July 26, The New Hampshire departed Faslane, Scotland, after a routine port call.

November 9, USS New Hampshire moored at Pier 31S on Naval Submarine Base New London following a six-month deployment. The sub traveled 40,000 nautical miles and also made port calls to Haakonsvern, Norway; and Brest, France.

February 8, 2017 USS New Hampshire moored at Berth 11C on Portsmouth Naval Shipyard in Kittery, Maine, for a scheduled Drydocking Selected Restricted Availability (DSRA); Entered the Dry Dock #2 on March 13.

May 18, Northrop Grumman Systems Corp., Sunnyvale, Calif., was awarded a $7,3 million contract for maintenance, modernization, and material support services for turbine generators on the New Hampshire. Work will be performed in Kittery, Maine, and is expected to be completed by July 2018.

October 27, Cmdr. Brandon E. Todd relieved Cmdr. Jason E. Weed as commanding officer of the SSN 778.

July 7, 2019 The New Hampshire departed Portsmouth Naval Shipyard for sea trials in the Boston Op. Area, following an extended 29-month availability.

July 16, USS New Hampshire moored at Berth 5, Pier 3 in its new homeport of Naval Station Norfolk; Underway again on Aug. ?.

August 16, The New Hampshire made a brief stop off Naval Station Norfolk for personnel transfer; Brief stop off Norfolk again on Aug. 20; Moored at Naval Weapons Station Yorktown for ammo onload from Aug. 23-30.

September 4, USS New Hampshire moored at Shearwater Jetty on Canadian Forces Base (CFB) Halifax, Nova Scotia, for a scheduled port visit before participating in at-sea phase of NATO anti-submarine warfare exercise Cutlass Fury 2019; Emergency sortied due to Hurricane Dorian on Sept. 6; Participated in a photo exercise (PHOTOEX), off the coast of Halifax, on Sept. 11.

October 1, The New Hampshire moored at Berth 5, Pier 3 on Naval Station Norfolk; Underway again on Oct. 8; Brief stop off Naval Station Norfolk on Oct. 13; Returned home on Oct. 14.

November 21, USS New Hampshire moored to Berth 2, Pier 3 on Naval Station Norfolk after a 30-day underway for routine operations; Underway again on Dec. 6.

From February 12-16, 2020, the New Hampshire conducted acoustic trials approximately 2 miles off the coast of North Beach in Hollywood, Fla., and Port Everglades.

March 2, USS New Hampshire moored to Berth 4, Pier 14 on Naval Station Norfolk; Underway again on March 9; Brief stop off Norfolk for personnel transfer on March 19; Moored at Berth 1, Pier 3 on March 23.

April 10, Cmdr. Bennett Christman relieved Cmdr. Brandon E. Todd as the 6th CO of New Hampshire during a change-of-command ceremony on Naval Station Norfolk.

June 4, The New Hampshire moored at Berth 1, Pier 3 on Naval Station Norfolk after underway for routine operations; Underway again from June 22-27 and Aug. 31; Brief stop off Naval Station Norfolk on Sept. 1.

September 14, USS New Hampshire moored at Naval Weapons Station Yorktown, Va., for a 10-day ammo onload; Brief stop off Naval Station Norfolk on Sept. 29 and Oct. 3; Moored at Berth 1, Pier 3 on Oct. 7; Moved to Berth 2, Pier 12 on Oct. 30.

November 6, USS New Hampshire departed Norfolk for a scheduled North Atlantic deployment.

November 12, The New Hampshire moored at Pier 8S on Naval Submarine Base New London for a one-day port call.

January 5, 2021 USS New Hampshire moored at Valiant Jetty on Her Majesty's Naval Base (HMNB) Clyde in Faslane, Scotland, for a six-day port call; Moored at HMNB Clyde again from Jan. 29- Feb. 1 and Feb. 5-17; Brief stop in Faslane on April 26.

May 7, USS New Hampshire moored at Berth 2, Pier 3 on Naval Station Norfolk following a six-month deployment. The sub traveled more than 40,000 nautical miles and also made port call to Haakonsvern, Norway.

June 24, The New Hampshire moved from Pier 3 to Berth 3, Pier 12 on Naval Station Norfolk; Moved to Berth 6, Pier 3 on July 6; Underway again on July 15; Brief stop off Norfolk on July 21; Moored at Berth 5, Pier 3 on July 23; Moored at NWS Yorktown for ammo offload from Oct. 6-18.

October 22, SSN 778 made a brief stop off Naval Station Norfolk for personnel transfer; Moored at Trident Wharf in Port Canaveral, Fla., from Nov. 13-1?; Brief stop off Norfolk again on Nov. 22; Moored at Berth 6, Pier 3 on Nov. 24; Underway again on Dec. ?.

February 1, 2022 USS New Hampshire made a brief stop off Naval Station Norfolk for personnel transfer; Moored at Berth 2, Pier 3 on Feb. 4; Underway again on Feb. 18; Brief stop off Norfolk on Feb. 27; Moored at Shearwater Jetty on Canadian Forces Base (CFB) Halifax, Nova Scotia, from March 8-14.

March 18, The New Hampshire moored at Berth 6, Pier 3 on Naval Station Norfolk; Underway again from April 4-8 and May 16; Moored at NWS Yorktown for ammo onload from May 20- June 3; Moored at Berth 1, Pier 3 on June 10.

June 21, The New Hampshire departed homeport for routine operations; Brief stop off Naval Station Norfolk for personnel transfer on June 25 and 27th; Moored at Berth 1, Pier 3 on July 1.

July 14, USS New Hampshire departed Norfolk for a surge deplyment in the U.S. 6th Fleet Area of Responsibility (AoR).

August 3, The New Hampshire made a brief stop off the coast of Gourock, Scotland, for personnel transfer; Moored at HMNB Clyde in Faslane from Sept. 2-8; Brief stop off Gourock on Oct. 6; Moored at HMNB Clyde again from Nov. 1-10; Transited the Straits of Moyle westbound, just before midnight, on Nov. 10.

December 21, SSN 778 moored at Haakonsvern Naval Base, Norway, for a week-long liberty port visit to Bergen; Brief stop off Norfolk to embark the Nuclear Propulsion Examination Board (NPEB) personnel, for Operational Reactor Safeguards Examination (ORSE), on Jan. 15.

January 17, 2023 USS New Hampshire moored at Berth 2, Pier 3 on Naval Station Norfolk following a six-month deployment.

January 20, Cmdr. Carl D. Jappert relieved Capt. Bennett Christman as CO of the New Hampshire during a change-of-command ceremony on Naval Support Activity Hampton Roads.

March 10, The New Hampshire moored at Naval Weapons Station Yorktown for week-long ammo offload; Moored at Berth 1, Pier 14 on March 17; Moored at NWS Yorktown again, before underway for exercise Agile Player 23, from May 3-5; Brief stop off Naval Station Norfolk for personnel transfer on May 9, 15, 16, 23, 26 and June 5.

June 8, USS New Hampshire moored at Berth 6, Pier 3 on Naval Station Norfolk; Underway again on July 10; Brief stop off Norfolk for personnel transfer on July 14; Moored at Berth 2, Pier 4 on July 24; Underway again from July 25-27.

October 5, The New Hampshire moored at Berth 6, Pier 4 on Naval Station Norfolk after a one-day underway in the Virginia Capes Op. Area; Underway again on Dec. 1; Brief stop off Norfolk on Dec. 4; Brief stop at Berth 6, Pier 4 on Dec. 8 and 15th; Returned home on Dec. 19.

January 3, 2024 USS New Hampshire departed homeport for routine operations; Brief stop off Naval Station Norfolk for personnel transfer on Jan. 8 and 10th; Moored at Berth 6, Pier 4 on Jan. 11; Underway again on Feb. 27; Brief stop off Naval Station Norfolk on March 4; Returned home on March 7; Underway again on March 15.

March 18, The New Hampshire made a brief stop off Naval Station Norfolk for personnel transfer; Returned home on March 22.

April 2, USS New Hampshire departed Norfolk for a scheduled North Atlantic deployment.

April 18, The New Hampshire made a brief stop off the coast of Keflavik, Iceland, for personnel transfer and supplies.