the chamber and pass it out to a member of the team for disposal over the side. While this is occurring, team members may be called upon to set up fire hoses with special  attachments  for  internal  and  external  gun cooling.   External   cooling   will   normally   begin immediately after a misfire. Internal cooling can only be started after the propelling charge has been removed. These procedures are directed by the mount captain. External cooling directs cooling water to the outside of  the  gun  barrel  through  a  standard  fire  nozzle configured  to  be  attached  to  the  barrel.  Internal  cooling uses a special applicator, which is inserted into the gun barrel, to directly cool the inside of the barrel and projectile. Another  similar  task  for  magazine  crew  members  is to assist in the disposal of leaking white phosphorous projectiles. Both tasks require regular training and practice. Since the procedure for the disposal of leaking white phosphorous projectiles is subjected to regular revision, this procedure will not be discussed here. All  hands  aboard  ship  should  become  familiar  with certain standard gunnery commands. All gun and magazine crew members, however, need to become especially familiar with these commands. Like the gun crew, the magazine crew must operate as a smooth, safe machine. NOW MAN ALL GUNNERY STATIONS is the command  used  to  direct  gun  and  magazine  crew personnel  to  “Lay  to  assigned  stations;  get  in  battle dress; and make preparations to service gun(s) for action.” Other standard gunnery commands, along with the proper interpretation, are as follows: LOAD—Ammunition handlers in magazine crews fill  projectile  hoists  or  mechanisms  with  prescribed ammunition. COMMENCE FIRING—This is a command from gunfire control indicating that firing of designated gun(s)  is  authorized. CHECK  FIRE—A gong or siren is sounded and all guns  immediately  stop  firing. RESUME FIRING—Gunfire control orders firing to start again. This command is given AFTER a CHECK FIRE. CEASE  FIRE—All  guns  stop  firing  immediately upon receipt of this command. A gong or siren is sounded. Gun captains automatically report to gunfire control on the condition of the gun bore, the number of rounds fired and the number of casualties, if any. An example would be “Mount 51 bore clear, 10 rounds expended,  no  apparent  casualties.” SILENCE—Any  member  of  the  gun  crew  or magazine crew who observes a serious casualty or dangerous condition requiring immediate attention for safety  reasons  will  sound  off  “SILENCE.” All personnel hearing this command freeze in position until further orders or CARRY ON is heard. The senior person at the scene will take charge and remedy the  unsafe  condition. SUMMARY In this chapter, we discussed today's naval gun systems and the type of ammunition used by each. This basic knowledge should enable you to perform as an integral member of a gun or magazine crew. This manual should help you in your at-sea experiences and, together with practical experience gained over a period of time, provide the necessary guidance you will need to become a top-notch Seaman. Your time at sea should be both challenging  and  rewarding. 6-23