The Portsmouth Naval Shipyard is the oldest Shipbu...

The Portsmouth Naval Shipyard is the oldest Shipbuilding yard in America. Portsmouth Naval Shipyard overhauls and repairs newer Virginia Class Submarines as well as first class modernization, repair and overhaul of Los Angeles-class submarines also known as fast attack 688 class submarines. The primary mission of the Portsmouth Naval Shipyard is to defend the Constitution. PNSY does this by providing the United States Navy with Full support to get our nation's Submarines back to sea safely, on time and under budget. The Portsmouth Naval Shipyard is on an Island and is a leader in environmental protection and managment. The Men and Women who are employed at the Yard as well as those stationed to defend our country are some of the finest Men and Women in the world.