what is navsea
Seal of the Naval Sea Systems Command. NAVSEA logo. The Naval Sea Systems Command (NAVSEA) is the largest of the United States Navy 's five systems commands, or materiel (not to be confused with material) organizations.he Naval Sea Systems Command was established on 1 July 1974 with the merger of the Naval Ship Systems Command with the Naval Ordnance Systems Command. The Naval Ship Systems Command was established in 1966 replacing the Navy's Bureau of Ships (BuShips).