US Navy's first San Antonio Flight II amphibious warship USS Harrisburg completes sea trials with over 200 design changes

HII’s Ingalls Shipbuilding announced on 3 November 2026 that Harrisburg, hull LPD 30, had completed builder’s sea trials as the first Flight II San Antonio-class amphibious transport dock. The ship incorporates more than 200 design changes from the earlier configuration, and the multi-day trials evaluated propulsion, steering, ship controls, communications and mission and combat systems integration. Harrisburg returned to Ingalls after meeting its major test objectives and will prepare for separate acceptance trials before delivery. HII expected to hand the ship over to the United States Navy later in 2026.