The OPNAV 4790/2L is a maintenance docu- ment that amplifies the OPNAV 4790/2K. Space is  provided  for  small-scale  drawings  and  blueprint references or model pictures. Specific instructions for completion of this form are also contained in OPNAVINST  4790  series.  A  sample  OPNAV 4790/2L  is  shown  in  figure  3-11. The  operation,  care,  and  maintenance  of audiovisual  equipment  used  in  the  CRP  are covered  in  chapter  7  of  RP  3  &  2,  module  1, Personnel  Support,  NAVEDTRA  287-01-45-82. MAINTENANCE   ASHORE At a shore installation, the leading RP should become familiar with the following management procedures  and  be  prepared  to  take  the  actions indicated. . Know about the assigned spaces. Be aware of the location; room temperature; operation and safety  features  and  discrepancies  of  switches, panels,   thermostats,   fire   alarms,   fire-fighting equipment,  heating  units,  and  so  forth. . Work closely with the public works center. Record  the  names  and  phone  numbers  of  a  few key  personnel  and  follow  the  proper  procedures for effecting maintenance actions and submitting maintenance  documents. l  Conserve  energy. .  Consult  operating  manuals  for  assigned equipment and follow stated maintenance guide- lines. l  Be  knowledgeable  about  all  maintenance documents  and  documentation  procedures. . Ensure that subordinates are trained and educated   regarding   maintenance   actions   and documentation. MAINTENANCE  ABOARD  SHIP Aboard  ship,  the  leading  RP  should  become familiar   with   the   following   maintenance   pro- cedures  and  be  prepared  to  take  the  actions indicated. l  Know  the  location  of  assigned  spaces— even in the dark. Know where control panels and switches  are  located.  Be  able  to  locate  and  operate damage  control  and  fire-fighting  equipment  as required. .   Report   equipment   discrepancies   to   the proper  office  immediately  for  repair. .   Ensure   that   routine   maintenance   of assigned  equipment  is  accomplished  and  docu- mented. .   Conserve   energy.   Electrical   power   pro- duced   by   the   ship’s   generators   is   a   precious commodity and should always be used wisely and efficiently.  Take  care  not  to  overload  circuits. .  Consult  operating  manuals  for  assigned equipment and follow stated maintenance guide- lines. .  Be  knowledgeable  about  all  maintenance documents  and  documentation  procedures. .  Ensure  that  subordinates  are  instructed and  trained  in  maintenance  actions  and  that documentation  of  maintenance  is  performed. PMS  ABOARD  SHIP Aboard  ship  preventive  maintenance  is  the order  of  the  day.  The  old  dictum  “an  ounce  of prevention  is  worth  a  pound  of  cure”  applies  here. Just as we care for the engine of our car by fre- quent oil changes and lubrication, all hands must apply  equal  diligence  in  performing  preventive maintenance  on  assigned  equipment. To achieve this goal, the Navy has developed the Planned Maintenance System (PMS). This is a  controlled  system  that  orders  periodic  main- tenance   actions   to   be   taken   on   equipment. Maintenance   actions   may   be   ordered   daily, weekly, monthly, quarterly, or maintenance may be  required  according  to  operation  schedules,  such as   “after   100   hours   of   operation”   or   “after pulling  into  port.”  Generally speaking, the fre- quency of maintenance actions is determined by statistics on the effectiveness of PMS in the past. While  the  importance  of  PMS  aboard  ship cannot be overemphasized, PMS at shore stations may be required of RPs as well. Whether at sea or ashore, RPs should study OPNAVINST 4790, which  contains  procedures  for  conducting  PMS. Volume  2  of  this  series  is  particularly  helpful. A particularly vital PMS function aboard ship is   maintenance   performed   on   damage   control equipment.  RPs  may  be  assigned  as  Damage 3-24