in advance and further believes that the best interest of the Navy or unit would be served by permitting a certain visit, approval may be granted. However, the duty officer should notify the commanding officer of the circumstances as soon as practical. NOTE: UNCLEARED  VISITORS  MAY NOT  ENTER  NUCLEAR  ENGINEERING SPACES  OR  ANY  OTHER  LIMITED  OR EXCLUSION AREA. SECURITY FROM UNAUTHORIZED VISITORS Situations could occur in which an un- authorized person (such as a commercial agent, occupant of a pleasure boat, or a member of a nonmilitary organization) would attempt to board the unit for various reasons, including mischief, revelry, or political purposes. Such boardings should be prevented, and steps should be taken to deal with the offender(s). In a U.S. port, violators should be taken into custody and immediately delivered to federal law enforcement officers. In a foreign port you should immediately notify local law enforcement agencies of any willful or attempted violation of security orders. Violators should NOT be taken into custody unless it is necessary to maintain the unit’s safety and security. SECURITY WATCHES IN U.S. AND FOREIGN PORTS The unit’s security watch bill is designed to provide the maximum security of the unit consistent with the performance of assigned missions and routine functions. You should always be alert to detect personnel attempting to board other than at the brows, sea ladders, or other normal access areas. When anchored or moored, the ship has the following  watches: Command duty officer (CDO) Officer of the deck (OOD) Petty officer of the watch (POOW) Security patrol (SP) Cold iron watch—in engineering spaces not otherwise occupied The following watches are manned if required by local conditions: Pier security (if moored to a pier) Forecastle and fantail sentries (continuous watch in foreign ports; from sunset to sunrise in U.S. ports) Signal watch The OOD is directly responsible to the commanding officer for the posting of all security watches and sentries. Security is obtained by alertness, position, and mobility. When ships are secured to piers or moored in crowded harbors, they are particularly vulnerable. Any person who has reason to believe the ship is in danger of sabotage should notify the OOD immediately. The possibility of floating mines or an attempt to attach limpet mines to the side of the ship is always present where hostile or subversive elements exist. If, while standing the OOD, you are required to be armed, the pistol should be carried unloaded. Two loaded clips should be carried in the belt. Pistols should be used only in case of emergencies or when the security of the ship is threatened. You should never remove the pistol from the holster except to resist forceful entry to the ship or to make the inspection required when relieving the watch. The following safety precautions should be strictly adhered to while inspecting the pistol before relieving the watch: 1. Keep the pistol pointed upward to 45° and on a clear bearing during inspection. 2. Make sure that the magazine is removed. 3. Open the slide and lock it open, 4. Visually inspect the breech, chamber, and barrel. 5. Close the slide. 6. Lower the hammer to release tension on the hammer spring. Pier Security Patrol Pier sentries stand 4-hour watches armed with a rifle. They patrol that portion of the pier between the bow and the stern of the ship to prevent unauthorized persons from approaching the vicinity of the ship. They allow no one to board or leave except by the brow and to prevent loitering on the dock near the ship. 5-12