The next commander of the Portsmouth Naval Shipyard is about to take charge. After 3 ½ years at the helm, Capt. L. Bryant Fuller is stepping down in a ceremony Friday. He is to be relieved by Capt. William Greene, who serves as the military deputy for shipyard operations at the Naval Sea Systems Command. Greene, a native of Ann Arbor, Mich., has served in numerous engineering and combat systems assignments, including postings at Puget Sound, Wash., and Pearl Harbor, Hawaii. The Portsmouth Herald reports, Fuller is leaving for Washington, D.C., where he will be deputy commander for ship design, integration and naval engineering at Naval Sea Systems Command.