The Lassen (DDG 82) is the fourth Oscar Austin-class guided-missile destroyer and the first ship in the U.S. Navy named after Commander Clyde Everett Lassen who earned the Medal of Honor for his courageous rescue of two downed aviators while commander of a search and rescue helicopter in Vietnam.

The keel was laid down on August 24, 1998, at Ingalls Shipbuilding in Pascagoula, Mississippi; Launched and christened on October 16, 1999.

April 21, 2001 USS Lassen was commissioned during an 11 a.m. EST ceremony at the Florida Aquarium Pier in Tampa, Fla.

July 5, 2002 U.S. Navy ships: USS Lassen, USS O'Kane (DDG 77), USS Lake Erie (CG 70), USS Crommelin (FFG 37), USS Paul F. Foster (DD 964) and USS Tarawa (LHA 1) along with ships from Peru, Chile, Japan, Canada, Australia, Republic of Korea and the United Kingdom are currently participating in a biennial exercise "Rim of the Pacific" (RIMPAC) 2002, off the coast of Hawaii.

September 5, Cmdr. Hugh D. Wetherland relieved Cmdr. Sean E. O'Connor as the 2nd commanding officer of DDG 82.

January 16, 2003 USS Lassen departed San Diego for its maiden western Pacific deployment, with the USS Carl Vinson (CVN 70) Battle Group.

March 14, USS Lassen pulled into Pusan, Republic of Korea, for a port visit in conjunction with the commencement of exercise Foal Eagle that began March 4 and will continue through April 2. Foal Eagle is an annual joint and combined field training and maritime exercise between the U.S. and Republic of Korea (ROK) armed forces.

May 14, USS Lassen arrived at Garden Island Naval Base for a six-day port visit to Sydney, Australia.

July 3, DDG 82 pulled into Vladivostok, Russia, for a four-day port call.

July 14, The guided-missile destroyer arrived in Perth, Australia, for a scheduled port visit.

August 6, USS Lassen anchored in Victoria Harbor for a scheduled port visit to Hong Kong.

August 15, The Lassen recently moored outboard the USS Frank Cable (AS 40) in Sasebo, Japan, to get tender support services.

October 3, Ship Repair Facility (SRF), Yokosuka, was able to get USS Lassen underway and headed back to its homeport in San Diego, by completing an intensive three-week docking repair. It was the first time the Lassen had a docking repair in Yokosuka and included the complete change out of the port hub, modification of the starboard hub, and repairs on all the blades and on the coating of the rudders.

September 2, 2005 USS Lassen arrived at its new forward-deployed operating base Commander, Fleet Activities Yokosuka (CFAY).

March 29, 2006 DDG 82 is currently undergoing a Selected Restricted Availability (SRA) while pierside at FAY.

May 31, Cmdr. Marshall B. Brown relieved Cmdr. Kerry S. Gilpin as CO of the USS Lassen during a change-of-command ceremony at Naval Station Yokosuka.

June 20, USS Lassen is currently participating in exercise Valiant Shield '06, off the coast of Guam, as part of the USS Ronald Reagan (CVN 76) CSG.

November 9, The Lassen commenced its participation in a bilateral exercise ANNUALEX with the Japanese Maritime Self-Defense Force; Liberty port visit to Hong Kong in late November.

January 9, 2007 USS Lassen entered the dry-dock at Fleet Activities Yokosuka to begin a regularly scheduled maintenance; Underway for sea trials on Feb. 15.?

April 14, The guided-missile destroyer pulled into Apra Harbor, Guam, for a brief port call.

April 23, USS Lassen arrived in Sydney, Australia, for a four-day port visit to participate in the Australia-New Zealand Army Corps (ANZAC) Day commemoration events and provide tours and demonstrations of its capabilities to industry leaders.

May 3, The Lassen pulled into Brisbane, Australia, to participate in the Battle of Coral Sea commemoration events; Inport Adelaide from May 11-1?.

June 1, USS Lassen returned to homeport following a two-month underway period.

June 18, DDG 82 arrived in Oita, Japan, for a scheduled port visit, the first by U.S. Navy ship in three years.

September 20, Sailors aboard USS Lassen practiced Mediterranean mooring at Commander, Fleet Activities Yokosuka. Med or "stern to" mooring is a common docking procedure for yachts and small boats at marinas, as well as ports in the Mediterranean and the Pacific. The advantage is that less pier space is used, so more ships can fit into a smaller area.

September 24, USS Lassen arrived in Vladivostok, Russia, to participate in Pacific Eagle, a bilateral exercise with the Russian Federated Navy.

November 16, The Lassen completed its participation in ANNUALEX 19G, in the Philippine Sea, the maritime component of the U.S.-Japan exercise Keen Sword 08.

February 15, 2008 USS Lassen pulled into Nagasaki, Japan, for a scheduled port call.

April 8, The guided-missile destroyer arrived in Shanghai, China, for a goodwill port visit.

January 26, 2009 The Lassen arrived in Dili, Timor-Leste, for a scheduled port visit.

January 31, DDG 82 arrived off the coast of Bali for a rare visit to the southern Indonesian island.

February 15, USS Lassen had a minor collision with the small boat "SUMOMO2" that was anchoring in the port of Yokosuka. No injuries were reported. The destroyer returned to homeport after completing undersea warfare exercise with the John C. Stennis (CVN 74) Carrier Strike Group and Japan Maritime Self-Defense Force.

March 23, USS Lassen is currently undergoing a Drydocking Selective Restricted Availability (DSRA) at the Ship Repair Facility Yokosuka.

April 23, Cmdr. H.B. Le relieved Cmdr. Anthony L. Simmons as CO of the Lassen in a ceremony that served as lead-in for the upcoming celebration of Asian Pacific American Heritage Month. Le was born in Hue, Vietnam, and immigrated with his family to the United States in June 1975.

September 14, USS Lassen pulled into Shimonoseki, Japan, for a goodwill port visit; Participated in a Multi-Sail 2009 exercise, off the coast of Okinawa, in late September.

November 7, USS Lassen arrived in Da Nang, Vietnam, for a scheduled port call.

November 25, The guided-missile destroyer arrived in Hong Kong for a scheduled port visit after participating in Annual Exercise (ANNUALEX) 21G.

February 19, 2010 USS Lassen arrived in Saipan for a goodwill port visit to the bigest island of the United States Commonwealth of the Northern Mariana Islands.

March 21, DDG 82 recently arrived in Republic of Korea to participate in a bilateral exercise Foal Eagle 2010. The ship recently departed on its routine spring deployment.

April 23, The Lassen arrived in Goa, India, to participate in a week-long bilateral exercise Malabar 2010.

May 17, USS Lassen recently arrived in Thailand to participate in the second phase of Cooperation Afloat Readiness and Training (CARAT) exercise.

May 26, USS Lassen returned to Fleet Activities Yokosuka after two-and-a-half month patrol.

July 16, USS Lassen departed homeport for a western Pacific patrol.

July 25, The Lassen departed Fleet Activities Sasebo after a four-day port call to participate in a combined alliance maritime and air readiness exercise Invincible Spirit, involving the Republic of Korea and the United States, in the East Sea through July 28.

September 21, USS Lassen completed its participation in a 10-day joint exercise Valiant Shield 2010, off the coast of Guam. The guided-missile destroyer recently departed Yokosuka for its annual Fall Patrol, as part of the USS George Washington (CVN 73) CSG.

October 2, USS Lassen pulled into Subic Bay, Republic of the Philippines, for a scheduled port visit.

October 12, The Lassen arrived in Busan, Republic of Korea, to participate in Proliferation Security Initiative (PSI) exercise Eastern Endeavor 2010.

October 28, The Lassen emergency sortied from Fleet Activities Yokosuka to avoid the approaching Typhoon Chaba.

November 28, USS Lassen entered the waters west of the Korean peninsula, with the Washington Carrier Strike Group, to participate in a combined military exercise with the Republic of Korea. The exercise is part of the series announced at the 2 + 2 meetings in July and is scheduled to run until Dec. 1.

December 13, DDG 82 returned to CFAY after completing its participation in joint exercise Keen Sword 2011, off the coast of Japan, from Dec. 3-10.

December 17, Cmdr. Walter C. Wrye, IV relieved Cmdr. Hung B. Le as the 7th CO of the Lassen.

March 21, 2011 USS Lassen departed Yokosuka as a "precaution" after low levels of radiation were detected last week by USS George Washington, from a heavily damaged Fukushima nuclear power plant. The ship will head to Sasebo to continue its maintenance availability period; Inport Fleet Activities Sasebo from March 25 through May 30.

June 4, The Lassen returned to homeport after a four-day underway for sea trials and ammunition on-load, completing the $11 million worth Selected Restricted Availability (SRA).

June 19, The guided-missile destroyer pulled into White Beach Naval Facility, Okinawa, for a brief port call; Inport Kure, Japan, from June 24-2?.

July 23, USS Lassen returned to Fleet Activities Yokosuka after a 10-day underway for training and qualifications; Held an "Open House," in conjunction with the 35th annual Friendship Day festival, on Aug. 6; Underway for a Friends and Family Day Cruise on Aug. 27.

August 30, The Lassen departed homeport to avoid Tropical Storm Talas in anticipation of the typhoon’s projected arrival on early Friday morning.

September 19, The Lassen arrived in Fleet Activities Sasebo, Japan, for a brief port call; Returned home on Sept. 27.

November 16, USS Lassen pulled into Laem Chabang, Thailand, to provide flood relief assistance at the National Blood Center in Bangkok. The ship recently participated in a bilateral Annual Exercise (ANNUALEX) as part of the USS George Washington CSG.

December 8, USS Lassen returned to Fleet Activities Yokosuka following a seven-week Fall Patrol; Underway again on Jan. 19.

January 26, 2012 The Lassen recently moored at White Beach Naval Facility, Okinawa, to participate in a Multi-Sail 2012 exercise.

February 3, The guided-missile destroyer pulled into Yokohama, Japan, for a brief port visit to participate in the Tokyo Metropolitan Government Stranded Commuter Assistance drill; Returned home on Feb. ?; Underway again from March 7-12.

April 16, USS Lassen returned to Fleet Activities Yokosuka after an 11-day underway for Ship Anti-Submarine Warfare Readiness/Effectiveness Measure (SHAREM) 170 exercise with the Japanese Maritime Self-Defense Force (JMSDF) ships.

May 17, DDG 82 recently pulled into Sattahip Naval Base to participate in Cooperation Afloat Readiness and Training (CARAT) Thailand 2012.

June 5, USS Lassen returned to homeport after a 47-day underway period for upkeep before continuing with western Pacific patrol.

June 7, Cmdr. Scott C. McClelland relieved Cmdr. Walter C. Wrye, IV as CO of the Lassen; Departed Yokosuka again on June 8.

June 27, The Lassen moored at Berth 6, India Basin in Fleet Activities Sasebo, Japan, for a three-day port call.

July 10, USS Lassen anchored in Victoria Harbour for a five-day port visit to Hong Kong; Inport Sasebo again from July 23-28 and Aug. 7-10.

August 16, USS Lassen returned to Yokosuka after completing a four-month western Pacific patrol.

August 24, The Lassen entered the Dry Dock #5 at Yokosuka Naval Shipyard for a Drydocking Selected Restricted Availability (DSRA); Departed dry-dock on Oct. 24; Underway for sea trials and ammo onload from Dec. 10-18; Underway for local operations on Jan. 11.

January 18, 2013 USS Lassen departed Fleet Activities Yokosuka for a western Pacific patrol; Anchored at A-12 on Jan. 22.

January 27, The guided-missile destroyer recently pulled into Fleet Activities Sasebo for a routine port call; Underway on Feb. 1.

February 5, DDG 82 arrived in Otaru, Hokkaido, Japan, for a goodwill port visit; Returned home on Feb. 11.

March 4, USS Lassen departed homeport in support of annual exercise Foal Eagle with the Republic of Korea Navy.

March 9, The Lassen moored outboard the USS Fitzgerald (DDG 62) at Donghae Naval Base, ROK, for a four-day port call; Returned to Yokosuka on March 23.

April 1, USS Lassen departed Yokosuka for a Multi-Sail 2013 exercise off Okinawa; Anchored in Buckner Bay from April 5-9; Returned home on April 18; Underway again on April 29; Conducted deck landing qualifications in Sagami Wan from May 2-3.

May 7, The Lassen arrived in Vladivostok, Russia, for a scheduled port visit to participate in Victory Day celebrations; Returned home on May 13.

June 26, USS Lassen departed Fleet Activities Yokosuka for a Summer Patrol as part of the USS George Washington CSG.

August 7, USS Lassen moored at Station Pier in Melbourne, Australia, for a scheduled port visit after participated in a biennial joint exercise Talisman Sabre 2013, off the coast of Queensland.

August 14, DDG 82 moored at Garden Island Naval Base in Sydney, Australia, for a scheduled port visit.

September 9, USS Lassen returned to homeport after a two-and-a-half month underway period.

October 9, USS Lassen departed Yokosuka for a Fall Patrol as part of the GW CSG; Anchored at A-10 for ammo onload on Oct. 9.

October 26, The Lassen moored outboard the USS Antietam (CG 54) at Changi Naval Base for a five-day port visit to Singapore.

November 8, The guided-missile destroyer moored at Buoy A77 in Victoria Harbour, Hong Hong, for a scheduled port visit; Emergency sortied on Nov. 11 to provide humanitarian assistance and disaster support to Philippines, in the wake of a deadly Super Typhoon Haiyan.

November 18, USS Lassen is currently underway in Leyte Gulf, distributing supplies from Tacloban to remote areas in support of Operation Damayan; Participated in Annual Exercise (ANNUALEX) 25G from Nov. 25-28.

December 6, USS Lassen returned to Fleet Activities Yokosuka after a two-month underway period.

December 11, Cmdr. Michael A. Smith relieved Cmdr. Scott C. McClelland as CO of DDG 82 during a change-of-command ceremony on board the ship.

From January 16-17, 2014, the Lassen was underway for deck landing qualifications in Sagami Wan; Underway again from Jan. 23-24 and Jan. 29.

March 3, USS Lassen departed homeport for a western Pacific patrol; Anchored at A-10 for ammo onload from March 3-4.

March 8, The Lassen anchored off Pyeongtaek Naval Base for the in-port phase of joint exercise Foal Eagle with the Republic of Korean Navy; Underway for at-sea phase from March 10-15; Participated in Group-Sail off Guam from March 21-25.

April 3, USS Lassen anchored at Yokosuka's A-12 to embark HSM-51 and HSM-77 Detachments before conducting DLQ in Sagami Wan; Returned home on April 4; Anchored at A-10 for ammo offload on April 9; Underway for sea trials and ammo onload at A-12, after a three-month Selected Restricted Availability (SRA), from July 14-17; Underway for INSURV Preps. on July 30, Aug. 5, Aug. 12-13, 19-20, 26, Sept. 2, 11-12, 15, and 17th; Underway for a Board of Inspection and Survey assessment on Sept. 23.

October 4, DDG 82 emergency sortied from Fleet Activities Yokosuka due to approching Typhoon Phanfone; Moored at Harbor Master Pier (HMP) East on Oct. 9; Underway in support of national tasking from Nov. 14-26; Underway in support of Ship Anti-submarine Warfare (ASW) Readiness and Evaluation Measurement (SHAREM) exercise from Dec. 1-16; Underway for local operations from Jan. 19-20.

February 3, 2015 USS Lassen departed Yokosuka for a western Pacific patrol; Anchored at A-12 before deck landing qualifications in Sagami Wan.

On February 11 and 13th, the Lassen participated in a joint drills with the JS Hamagiri (DD 155) and JS Kurama (DDH 144); Inport Sasebo, Japan, from Feb. 23-25.

February 26, USS Lassen moored at Japan Maritime Self-Defense Force (JMSDF) base Kure, Hiroshima Prefecture, for a two-day port call; Moored at Berth 7, Fleet Activities Yokosuka from March 1-2.

March 5, The guided-missile destroyer moored at North Wharf in Port of Donghae, Republic of Korea, for a three-day port call in preparation for annual joint exercise Foal Eagle; Inport Donghae again from March 12-14.

March 20, The Lassen moored at Tango Wharf in Apra Harbor for a three-day port call before participating in annual Multi-Sail exercise, southwest of Guam, from March 23-27; Moored at Sierra Wharf from March 27-29.

April 2, USS Lassen moored at Harbor Master Pier (HMP) West, Fleet Activities Yokosuka after completing a two-month patrol.

May 13, Cmdr. Robert Francis, Jr., relieved Cmdr. Michael A. Smith as the 10th CO of Lassen during a pierside ceremony at CFAY.

May 15, USS Lassen, with an embarked Helicopter Maritime Strike Squadron (HSM) 51 Detachment, departed homeport for a western Pacific patrol.

May 26, The Lassen moored at Berth 3, Juliet Basin Wharf in Fleet Activities Sasebo for a three-day port visit after participated in a trilateral naval exercise with the FS Aconit (F713) and TCG Gediz (F495), while underway south off the Korean Penninsula, on May 23 and 25th respectively. ROKS Yu Seoung Ryoung (DDG 993) and ROKS Kang Gamchan (DDH 979) also participated.

June 3, DDG 82 pulled into Subic Bay, Republic of the Philippines, for a brief port call to refuel. The Lassen recently entered the South China Sea for Maritime Security Operations (MSO); Inport Subic Bay again on July 1.

July 12, USS Lassen moored at Berth 8 in Changi Naval Base to participate in Cooperation Afloat Readiness and Training (CARAT) Singapore; Underway for at-sea phase from July 19-23; Inport Changi again from July 23-25.

August 3, USS Lassen moored at Berth 6, Fleet Activities Yokosuka following a two-and-a-half month patrol.

August 26, The Lassen departed homeport for a two-day underway to conduct Engineering Certifications (ECERT); Moored outboard the USS Mustin (DDG 89) at HMP East after a day-long underway on Sept. 11; Underway for a routine patrol in the South China Sea on Sept. 14.

October 19, USS Lassen moored at Sepanggar Naval Base in Kota Kinabalu, Malaysia, for a three-day liberty port visit.

October 27, The guided-missile destroyer transited within 6 nautical miles of Subi and Mischief reefs as a "show of force", testing the China's territorial claims over disputed Spratly archipelago.

November 2, USS Lassen moored at Conventional Terminal in Port of Muara to participate in CARAT Brunei; Underway for at-sea phase on Nov. 4; Joined the USS Theodore Roosevelt (CVN 71) off the northern coast of Malaysia on Nov. 5.

November 13, USS Lassen moored at HMP West, Fleet Activities Yokosuka following a two-month patrol.

November 17, The Lassen anchored at A-12 for ammo offload; Returned home on Nov. 18.

January 6, 2016 USS Lassen, with an embarked Helicopter Maritime Strike Squadron (HSM) 75 Det. 1, departed Yokosuka for a homeport change to Mayport, Florida, after forward-deployed to Japan for more than 10 years.

January 11, DDG 82 moored at Port of Saipan, Northern Mariana Islands, for a routine port call.

January 22, USS Lassen moored at Pier M3 on Joint Base Pearl Harbor-Hickam, Hawaii, for a four-day port visit.

February 1, The Lassen moored at Berth 2, Pier 3 on Naval Base San Diego, Calif., for an 11-day port call to conduct a crew swap with the USS Barry (DDG 52).

February 24, USS Lassen anchored off Cabo San Luca, Mexico, for a four-day liberty port visit; Moored at Berth 2 in Puerto Quetzal, Guatemala, for a brief stop to refuel on March 4.

March 13, The guided-missile destroyer recently moored at Pier C in Port of Acajutla, El Salvador, for a brief port call; Brief stop in Acajutla again on March 23.

March 31, The Lassen moored at Vasco Nunez de Balboa Naval Base for a four-day liberty port visit to Panama City; Brief stop in Acajutla to refuel on April 13.

April 14, USS Lassen conducted deck landing qualifications with two U.S. Army UH-60 Blackhawks, assigned to Joint Task Force-Bravo's (JTF-B) 1-228th Aviation Regiment and stationed at Soto Cano Air Base, while underway off the coast of Honduras.

April 23, The Lassen moored again in Port of Acajutla for a brief stop to refuel an take on supplies; Moored at Balboa Naval Base, Panama, for emergent repairs on April 29; Brief underway on May 15; Transited the Panama Canal from May 17-18.

May 19, USS Lassen moored at Quay 6, Cruise Terminal in Port of Cartagena, Colombia, for a four-day liberty visit; Brief stop at Naval Station Guantanamo Bay to refuel on May 25; Inport Ocho Rios, Jamaica, from May 27-31?; Brief stop in Port Evergaldes, Fla., to embark "Tigers" on June 3.

June 6, USS Lassen moored at Berth 3, Bravo Wharf on its new homeport of Naval Station Mayport, Fla., following a five-month deployment, in support of counter-narcotics operations, to the U.S. 4th Fleet Area of Responsibility (AoR). While operating in the eastern Pacific, the ship interdicted 18 vessels, arrested 49 smugglers, and seized nearly 25,000 pounds of cocaine.

August 22, The Lassen recently departed Mayport to conduct testing at the Atlantic Underwater Test and Evaluation Center (AUTEC) range, off Andros Island, Bahamas; Underway off the coast of Port Everglades, Fla., on Aug. 27; Moored at Berth 2, Bravo Wharf on Aug. 28; Underway again on Aug. 31.

September 2, USS Lassen moored at Passenger Pier in Nassau Cruise Port, Bahamas, for a four-day liberty visit in conjunction with the U.S. Labor Day.

September 13, Cmdr. Thomas G. Chekouras relieved Cmdr. Robert Francis, Jr., as CO of the Lassen during a pierside ceremony at Wharf B2 on Naval Station Mayport.

September 14, DDG 82 departed homeport in support of the live-fire, counter-unmanned aerial systems (C-UAS) technology demonstration Black Dart, in the Gulf of Mexico; Conducted testing off the coast of Destin, Fla., with the USS Jason Dunham (DDG 109), on Sept. 20.

October 28, The Lassen is currently moored at Bravo 2 Wharf on Naval Station Mayport; Underway again on Nov. 7.

November 10, USS Lassen moored at Gov. Nicholls Street Wharf in New Orleans, La., for a four-day port visit to participate in Veterans Day celebration; Returned home on Nov. 18.?

December 4, The Lassen is currently underway in support of the USS George H.W. Bush (CVN 77) CSG's Composite Training Unit Exercise (COMPTUEX), as part of opposition forces; Moored at Wharf D1 on Dec. 1?.

January 9, 2017 USS Lassen departed Naval Station Mayport in support of the USS Bataan (LHD 5) ARG's COMPTUEX, as part of opposition forces; Moored at Wharf A2 on Jan. 22; Underway again from Jan. 24-26; Moved to Wharf B3 on Jan. 2?; Underway again on Feb. 1.

February 23, USS Lassen moored at Wharf A2 on Naval Station Mayport; Underway for routine training on March 27; Moored at Wharf B1 on March 31; Underway again from April 3-7.

April 12, The guided-missile destroyer moored at Wharf D1 on Naval Station Mayport after a four-day underway for routine training; Underway again from April 18-20.

April 27, USS Lassen moored at Wharf B3 on Naval Station Mayport after a two-day underway in the Jacksonville Op. Area; Moored outboard the USS The Sullivans (DDG 68) at Wharf B3 on April 28.

May 8, The Lassen moored outboard the USS Farragut (DDG 99) at Wharf A2 on Naval Station Mayport after a six-day underway off the coast of Florida; Underway again on May 17.

May 24, USS Lassen moored at Homeport Pier in Stapleton, Staten Island, N.Y., for a six-day port visit to participate in the 29th annual Fleet Week New York City.

June 2, DDG 82 moored at Wharf B2 on Naval Station Mayport; Moved to Wharf C1 on June 26; Underway again on June 2?.

July 1, USS Lassen moored at Breakwater Pier in Eastport, Maine, for a five-day port visit to participate in Independence Day and Old Home Week festivities.

July 9, The Lassen moored at Wharf D1 on Naval Station Mayport; Underway again on July 10; Moored at Wharf E3 on July 27.

August 1, BAE Systems Southeast Shipyards Mayport LLC, Jacksonville, Florida, was awarded a $33,6 million contract for the USS Lassen's Drydocking Selected Restricted Availability (DSRA). Work is expected to be completed by March 2018.

August 10, The Lassen moored at Wharf E3 on Naval Station Mayport after a nine-day underway in the Jacksonville and Virginia Capes Op. Areas; Emergency sortied to evade the Hurricane Irma on Sept. 7; Returned home on Sept. 14.

October 28, USS Lassen entered the floating dry-dock at the BAE Systems Jacksonville Ship Repair facility on Fanning Island, Fla.

March 9, 2018 Cmdr. Ryan Ventresca relieved Cmdr. Thomas G. Chekouras as the 12th CO of Lassen, during a change-of-command ceremony on board the Floating Base Platform (YRBM) ?.

March 28, USS Lassen undocked and moored at Wharf A2 on Naval Station Mayport; Moved to Wharf C2 on May 14; Underway for sea trials on May 1?; Moored at Wharf A2 on May 21; Underway again from June 11-12 and June 1?.

June 18, The Lassen moored at Naval Weapons Station Yorktown, Va., for a four-day ammo onload; Returned to Mayport on June 26.

July 21, The Lassen moored at Wharf A2 on Naval Station Mayport after a four-day underway for routine training in the Jacksonville Op. Area; Underway again from Aug. 6-10 and Aug. 24-27; Underway in support of the USS Kearsarge (LHD 3) ARG's MEUEX, in the Jacksonville and Cherry Point Op Areas, on Aug. 30.

September 6, USS Lassen moored at Pier 7N, Fort Trumbull State Park in New London, Conn., for a four-day port visit to participate in the 6th annual Connecticut Maritime Heritage Festival.

September 11, USS Lassen moored at Pier 2S in Naval Station Newport, R.I., for a 10-day port visit in conjunction with the 23rd Chief of Naval Operation's International Seapower Symposium, hosted by the Naval War College; Returned home on Sept. 23.

October 22, The Lassen moored at Wharf A2 on Naval Station Mayport after a 26-day underway in support of the HMS Queen Elizabeth (R08) Task Group's WESTLANT 18, in the Virginia Capes and Atlantic City Op. Areas; Underway again on Nov. 5; Participated in a photo exercise (PHOTOEX), while underway off the coast of Atlantic City, on Nov. 11.

November 19, The Lassen moored at Wharf C2 on Naval Station Mayport for a brief stop to onload ammo before moored at Wharf A2; Underway in the Jacksonville Op. Area from Nov. 27-28; Brief underway on Nov. 30.

January 23, 2019 USS Lassen departed homeport in support of the USS Abraham Lincoln (CVN 72) CSG's COMPTUEX, as part of opposition forces; Brief stop off Morehead City, N.C., on Jan. 27.

February 1, DDG 82 moored outboard the USS Thomas Hudner (DDG 116) at Wharf D2 on Naval Station Mayport; Moved to Wharf A2 on Feb. 4; Underway again on Feb. 15.

From February 16-17, the Lassen conducted operations at the Atlantic Undersea Test and Evaluation Center (AUTEC) range, off the east coast of Andros Island, Bahamas; Brief stop in Naval Station Mayport on Feb. 19.

February 21, USS Lassen moored at Wharf A2 on Naval Station Mayport; Moved to Wharf C2, outboard the USS Farragut (DDG 99), on March 26.

April 1, The guided-missile destroyer moored at Wharf A2 after a four-day underway, in the Cherry Point Op. Area, in support of the USS Harry S. Truman (CVN 75) CSG's SUSTEX; Underway again on April 3.

April 12, USS Lassen moored at Naval Weapons Station Yorktown, Va., for a week-long ammo onload; Moored at Wharf D2 in Naval Station Mayport on April 21.

April 24, The Lassen moored at Wharf E1 on Naval Station Mayport after a one-day underway in the Jacksonville Op. Area; Underway for Submarine Commander's Course (SCC) with the USS James E. Williams (DDG 95) and HMCS Ville de Quebec (FFH 332), at the AUTEC range, on May 16; Transited northbound, east of Great Abaco Island, on May 22.

May 24, USS Lassen moored at Wharf C2 on Naval Station Mayport for a brief stop; Moored at Wharf C1 on May 25; Underway again on May 29; Moored outboard the USS Farragut at Wharf D1 on May 30; Moved to Wharf B2 on June 3; Brief underway on June 25.

July ?, Cmdr. Judson D. Mallory relieved Cmdr. Ryan Ventresca as commanding officer of the Lassen.

August 3, The Lassen moored at Wharf C2 on Naval Station Mayport after a 29-day underway for a Composite Training Unit Exercise (COMPTUEX); Emergency sortied due to approaching Hurricane Dorian on Aug. 30; Moored at Wharf B3 on Sept. 5.

September 12, USS Lassen departed Mayport for a scheduled deployment, as part of the USS Harry S. Truman CSG.

September 26, The Lassen moored at Pier 3 on Naval Station Rota, Spain, for a brief stop to refuel; Transited the Strait of Gibraltar eastbound on Sept. 27; Moored at Berth K12, East Refueling Wharf in Souda Bay, Crete, from Oct. 1-5; Transited the Suez Canal southbound on Oct. 8; Transited the Bab-el Mandeb Strait on Oct. 12.

October 13, The Lassen conducted a replenishment-at-sea with the USNS Alan Shepard (T-AKE 3), while underway in the Gulf of Aden; Conducted a replenishment-at-sea with the RFA Wave Knight (A389) on Oct. 17; Transited the Strait of Hormuz northbound on Oct. 18; Transited southbound on Oct. 20; Conducted a replenishment-at-sea with the USNS Big Horn (T-AO 198) on Oct. 21.

October 24, USS Lassen moored at Sultan Qaboos Port in Muscat, Oman, for a scheduled liberty visit; Conducted a replenishment-at-sea with the USNS Alan Shepard on Nov. 1; Conducted a replenishment-at-sea with the USNS Big Horn on Nov. 10; Conducted a replenishment-at-sea with the RFA Wave Knight on Nov. 15; Transited the Strait of Hormuz southbound on Nov. 18.

December 6, The Lassen conducted a replenishment-at-sea with the USNS Arctic (T-AOE 8), while underway in the North Arabian Sea; Conducted a replenishment-at-sea with the USNS Walter S. Diehl (T-AO 193) on Dec. 16; Conducted a replenishment-at-sea with the USNS Supply (T-AOE 6) on Dec. 27.

January 5, 2020 The Lassen conducted a replenishment-at-sea with the USNS Amelia Earhart (T-AKE 6), while underway in the Gulf of Oman; Conducted a replenishment-at-sea with the USNS Supply on Jan. 15, Feb. 1 and Feb. 8.

March 21, USS Lassen participated in a photo exercise (PHOTOEX) with the USS Harry S. Truman (CVN 75), USS Dwight D. Eisenhower (CVN 69), USS Normandy (CG 60), USS San Jacinto (CG 56) and USS Farragut (DDG 99), as a "show of force" while underway in the North Arabian Sea; Conducted a replenishment-at-sea with the USNS Robert E. Peary (T-AKE 5) on March 28; Transited the Suez Canal northbound on April 2; Transited the Strait of Gibraltar westbound on April 7.

April 29, The Lassen made a brief stop approximately 3 n.m. off the coast of Miami, Florida, for personnel transfer; Transited eastbound, approximately 12 n.m. off the coast of Jardines del Rey, Cuba, on April 30; Moored at Pier A in Naval Station Guantanamo Bay from May 1-10; Participated in a PHOTOEX with the USS Preble (DDG 88), USS Farragut and USS Detroit (LCS 7) on May 11.

June 6, The Lassen transited northbound, off the east coast of Florida, after underway in the Caribbean Sea for six weeks in support of counter-illicit trafficking operations; Moored at NWS Yorktown, Va., for ammo offload from June 8-12.

June 14, USS Lassen moored at Wharf E2 on Naval Station Mayport following a nine-month deployment, in the U.S. 4th, 5th and 6th Fleet Areas of Responsibility (AoR), that was extended for two months to protect the crew from the risks posed by COVID-19 global pandemic.

April 6, 2021 USS Lassen moored port side at Wharf E2 after a Turn Ship evolution on Naval Station Mayport; Underway for sea trials, following a nine-month Selected Restricted Availability (SRA), from April 9-11; Underway again on May 26; Moored at Wharf E2 for a brief stop on May 27; Returned home on May 28; Underway again on June 1.

June 25, The Lassen moored at Wharf E1 on Naval Station Mayport; Moved to Wharf B3 on June 2?; Underway in support of the USS Gerald R. Ford's (CVN 78) shock trials on July 6; Moored outboard the USS Farragut (DDG 99) at Wharf B2 on July 17; Moved to Wharf B3 on July 19; Underway again from Sept. 8-9 and Sept. 11.

September 13, DDG 82 moored at Naval Weapons Station Yorktown, Va., for a two-day ammo onload; Returned home on Sept. 17; Underway again from Sept. 29-30, Oct. ?-11 and Oct. 14.

October 28, USS Lassen moored at Wharf B1 on Naval Station Mayport; Underway again from Oct. 29-30; Day-long underway on Nov. 4; Moved to Wharf B3 on Nov. 12; Undrerway in support of the USS Kearsarge (LHD 3) ARG's exercise on Nov. 30.

December 17, USS Lassen moored at Wharf B1 on Naval Station Mayport; Underway in support of the USS Kearsarge ARG's COMPTUEX, in the Cherry Point, Charleston and Jacksonville Op. Areas, from Jan. 1?-28; Underway again from Feb. 11-14.

February 26, 2022 The Lassen moored at Wharf B1 on Naval Station Mayport after a six-day underway off the southeast coast of Florida; Underway again on March 7.

March 12, USS Lassen moored at Berth 18 in Port of St. John's, Newfoundland, for a four-day visit; Moored at Berth 6, Pier 2 on Naval Station Norfolk from March 21-23; Returned home on March 25; Underway again from March 30- April 1 and April 15.

April 18, USS Lassen moored at Julia Street Wharf in downtown New Orleans, La., for a four-day port visit to participate in Fleet Week festivities; Moored outboard the USS Donald Cook (DDG 75) at Wharf A2 on Naval Station Mayport from April 25-26.

May 1, USS Lassen moored at Berth 21, Pier 7 in Port Everglades, Fla., for a week-long port visit to participate in the annual Broward County Navy Days Ft. Lauderdale; Moored at Wharf B1 in Naval Station Mayport on May 9; Moved to Wharf C2 on June 1; Underway in support of the USS George H.W. Bush (CVN 77) CSG's COMPTUEX, in the Jacksonville, Charleston and Cherry Point Op. Areas, on June 2; Moored at Wharf F1 for a brief stop on June 28.

June 29, The Lassen moored at Berth 3 in Nassau Cruise Port, Bahamas, for a three-day liberty visit; Moored at Wharf C2 on July 3; Moved to Wharf B1 on July 5; Day-long underway on July 7.

August 18, The Lassen moored at Wharf B2 on Naval Station Mayport after a two-day underway in the Jacksonville Op. Area; Underway again on Aug. 21.

August 25, USS Lassen made a brief stop off the west coast of Saint Vincent Island; Moored at western Breakwater in Port of Bridgetown, Barbados, for a brief stop to refuel on Aug. 26; Moored at Multiple-use Pier (CMU) in Port of Suape, Pernambuco, Brazil, for a brief stop on Aug. 31.

September 3, USS Lassen moored at Mocangue Naval Base in Niteroi, Brazil, for a three-day port visit to Rio de Janeiro before participating in the Atlantic phase of a multinational exercise UNITAS LXIII.

September 7, The Lassen participated in a Parade of Ships, in conjunction with the bicentennial of the independence of Brazil; Moored at Mocangue Naval Base again on Sept. 7; Anchored approximately 1 n.m. east of Ilha das Cobras on Sept. 9; Underway for at-sea phase of UNITAS on Sept. 10; Moored at Mocangue Naval Base from Sept. 19-23.

September 28, The Lassen participated in a photo exercise (PHOTOEX) with the BNS Uniao (F45) and BNS Tikuna (S34); Moored at Multiple-use Pier (CMU) in Port of Suape for a brief stop to refuel on Sept. 29; Transited westbound, north of Saint Vincent Island, on Oct. 5; Moored at Pier 4 in San Juan, Puerto Rico, from Oct. 6-8.

October 11, USS Lassen moored at Wharf C1 on Naval Station Mayport; Underway again on Oct. 25; Brief stop in Mayport for personnel transfer on Oct. 28; Moored at Wharf B3 on Oct. 31; Underway again on Nov. 1; Arrived at AUTEC range, off the east coast of Andros Island, Bahamas, on Nov. 2; Transited northbound, off the east coast of Great Abaco Island, on Nov. 5.

November 6, The Lassen moored at Wharf B3 on Naval Station Mayport; Underway in the Jacksonville Op. Area from Nov. 15-21 and Dec. 5; Moored at Naval Weapons Station Yorktown, Va., for ammo offload from Dec. 12-16; Returned home on Dec. 17.

December 22, BAE Systems - Jacksonville Ship Repair LLC was awarded an $119,3 million contract for the USS Lassen's Depot Modernization Period (DMP). Work is expected to be completed by April 2024.

March 9, 2023 USS Lassen moved "dead-stick" from Naval Station Mayport to floating dry-dock on BAE Systems Jacksonville Ship Repair facility.