1800 – Shipyard established

1848 – First steam-powered vessel constructed.

1857 – Overhauled USS Constitution (Old Ironsides).

1917 – First submarine built at a U.S. Navy shipyard.

1937 – First U.S. submarine built with welded steel hull.

1944 – Yard establishes record by building 31 submarines in single year.

1953 – First teardrop shaped U.S. submarine, the Albacore.

1958 – First nuclear-powered submarine built at a government shipyard.

1971 – Last submarine produced at shipyard is commissioned.

1995 – Hosted commissioning of Trident submarine, USS Maine.

2005 – Pentagon proposes closing shipyard in May; national base closure commission votes to keep it open.