designated  as  a  source  of  casualty  power  to  the riser terminal by number. Upon receiving this information, damage control central orders the repair parties concerned to rig casualty  power  from  the  equipment  to  the designated  source. Repair parties rig casualty power and report each section  completed  to  damage  control  central. After  all  sections  have  reported  the  rigging completed,  damage  control  central  requests  the main  engine  control  electrical  officer  to “energize  casualty  power.” Upon receiving the request to energize, main engine control or the electrical officer directs the designated switchboard to “connect and energize casualty  power,”  and  to  report  compliance. The  Electrician’s  Mate  on  the  designated switchboard  rigs  the  first  cable  from  the  source of the system, closes the casualty power circuit breaker,  and  reports  casualty  power  energized  to main engine control, then reports compliance to damage control central. UNRIGGING CASUALTY POWER Unrigging  casualty  power  can  be  hazardous  if  not handled correctly. The  steps  to  be  taken  to  unrig casualty power lines are as follows: 1. 2. 3. 4, 5. Damage control central requests main engine control   to   de-energize   the   casualty   power system. Main  engine  control  directs  the  designated switchboard   to   de-energize   and   disconnect casualty power, and to report compliance. The  Electrician’s  Mate  at  the  switchboard  opens the casualty power circuit breaker, unrigs both ends  of  the  first  portable  cable,  and  reports “casualty  power  de-energized,”  to  main  engine control. Main  engine  control  reports compliance  to  damage  control  central. Upon  receiving  the  de-energized  reprt,  damage control   central   orders   casualty   power disconnected  at  the  equipment, The   repair   party’s   Electrician’s   Mate disconnects both ends of the last portable cable in the system at the load and reports, when completed  to  damage  control  central. 6. 7. Damage control central requests main engine control  to  energize  normal  circuits  to  the equipment  and  orders  repair  parties  concerned to unrig and restore the remainder of the portable cables. Main  engine  control  directs  the  designated switchboard to energize all normal circuits to the equipment  and  to  report  compliance.  Main engine control reports compliance to damage control central. The exercise is not considered completed until damage control central receives the report the equipment is operating on normal power and all portable cables are restored on their  proper  racks. Speed is desirable in all casualty power operation; however, safety precautions must never be sacrificed to attain speed. A thorough knowledge of the casualty power  system  and  frequent  drills  by  all  personnel involved are necessary for safe and expeditious results. SHORE POWER The  number  and  locations  of  shore  power connections  vary  on  different  types  of  ships.  Shore power  connections  are  provided  at,  or  near,  a  suitable weather-deck location to which portable cables from the shore  or  from  ships  alongside  can  be  connected  to supply power for the ship’s distribution system when the ship’s  service  generators  are  not  in  operation.  This connection  also  can  be  used  to  supply  power  from  the ship’s service generators to ships alongside. Shore-power  arrangements  and  hardware  used  on both ship and shore installations are so diversified that no  specific  installation  instructions  can  be  outlined  in detail. Ashore installation that has one circuit breaker supplying a number of cable sets presents a particular hazard. In this case, you can verify phase rotation and phase orientation only by energizing all shore terminals. You should check phase rotation with only one set of cables  installed.  The  latest  designs  have  a  single, 3-phase receptacle for ship and shine-power terminals. These receptacles are keyed in such a manner that phase rotation and orientation cannot be altered provided both the ship and shore use these receptacles, and the cables are not spliced. Phase orientation need not be checked before hookup. Systems that use 3-phase receptacles are normally designed so that interlocks on receptacles automatically  trip  associated  circuit  breakers  whenever the  cover  of  the  receptacle  is  open,  and  a  shore-power cable plug is not in place. However, you should still 3-16