Topic - Naval Sea Systems Command

The Naval Sea Systems Command (NAVSEA) is the largest of the U.S. Navy's five "systems commands," or materiel (not to be confused with "material") organizations. NAVSEA consists of four shipyards, eight "warfare centers" (two undersea and six surface), four major shipbuilding locations and the NAVSEA headquarters, located at the Washington Navy Yard, in Washington D.C. - Source: Wikipedia