Aviation Ordnancemen operate and handle aviation ordnance equipment. They are responsible for the maintenance of guns, bombs, torpedoes, rockets, and missiles. Their duties include the stowing, issuing, and loading of munitions and small arms. There are three different types of ordnanceman; "O" (organizational) level, "I" (intermediate) level, and "D" (depot) level. O-level ordnanceman are attached to squadrons ashore and afloat. They perform loading/downloading operations on aircraft. I-level perform maintenance on bomb racks, missile launchers, and all other aircraft armament components.