Overview
- USS Massachusetts, commissioned Saturday in Boston Harbor, enters active service as the Navy’s 25th Virginia-class fast-attack submarine.
- The Block IV configuration reduces planned maintenance over the sub’s life to enable more deployments than earlier variants.
- The 377-foot, roughly 7,800-ton nuclear-powered boat uses a life-of-ship reactor that removes mid-life refueling and boosts time at sea.
- The submarine is built for multi-mission roles with Tomahawk cruise missiles, torpedoes, quieting features, and advanced sonar for stealthy operations.
- Built by General Dynamics Electric Boat with HII’s Newport News Shipbuilding, the sub was christened May 6, 2023, delivered in November 2025, and now sails with about 147 sailors including 39 women.