The Ohio class guided missile submarine USS Georgia (SSGN 729) rests pierside at Naval Station Norfolk. Georgia made a brief stop at NS Norfolk while conducting sea trials after leaving Norfolk Naval Shipyards November 29, 2007, following the ship's conversion from a ballistic missile to a guided missile submarine. Georgia is the last of four submarines to be converted to SSGN. U.S. submarines (SSGN), successfully completed sea trials Dec. 11. rejoined the fleet yesterday. (SSBNs). full set of sea trials," said SSGN Program Manager Capt. Mark Bock.