Portsmouth Naval Shipyard (PNSY) undocked USS San Juan (SSN 751) one day ahead of schedule Aug. San Juan and its crew of 13 officers and 121 enlisted personnel arrived at PNSY Apr. 8, 2010. While at the shipyard, the sub is undergoing an engineered overhaul consisting of various maintenance work and several system upgrades. "San Juan is poised for a successful end game," said Shipyard Commander Capt. Bryant Fuller. "She has made more progress in her availability prior to undocking than any engineered overhaul the shipyard has performed in the past. Project Superintendent D.K.