October 7, 2025
HII Completes Initial Sea Trials of Virginia-Class Submarine Massachusetts (SSN 798)
NEWPORT NEWS, Va., (Oct. 7, 2025) — HII (NYSE: HII) announced today that its Newport News Shipbuilding division has successfully completed initial sea trials for Virginia-class attack submarine Massachusetts (SSN 798).
Over the course of several days at sea, the NNS and Navy team conducted testing of systems and components, including submerging the submarine for the first time and high-speed maneuvers while on the surface and submerged. The testing program will continue at NNS ahead of delivering the boat to the U.S. Navy.
“Our entire team at Newport News Shipbuilding understands the importance of delivering capability to our fleet,” NNS President Kari Wilkinson said. “Proving capabilities through this first sea trial for Massachusetts is an important step in demonstrating this and we are honored to support the mission.”
The boat, the 25th Virginia-class submarine, was christened in May 2023; Massachusetts will be the 12th delivered by NNS.
HII’s Newport News Shipbuilding division has successfully completed initial sea trials for Virginia-class attack submarine Massachusetts (SSN 798). Massachusetts spent several days at sea to test the boat’s systems and components (Photo by Ashley Cowan/HII).
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About HII
HII is America's Seapower Company. The nation’s largest shipbuilder, HII builds the manned and unmanned maritime systems and all-domain mission technologies that project U.S. and allied power around the world. With a more than 140-year history of advancing U.S. national security, HII is headquartered in Virginia and employs 46,000 people across three divisions.
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