stock. Another sign you should place in full view is a statement that all profits from the ship’s store go  to  the  recreation  fund. Some  of  these  signs  are  available  from  the ship’s store division of NAVRESSO. Consult the Ship’s  Store  Afloat  Visual  Merchandising Supplement  on    “Basic   Display   and   Signing Requirements”  for  what  is  currently  available. The other signs you need can be locally prepared. Remember,  you  should  use  the  standard  format prescribed by the  Navy  Correspondence  Manual and by the  Directives  Issuance  System,   part  II, in   your   preparation   of   policy   signs   and instructions. MAINTENANCE   AND   MATERIAL MANAGEMENT Every  Ship’s  Serviceman  should  be  familiar with  the  Ships’  Maintenance  and  Material Management  Systems,  commonly  referred  to  as the 3-M Systems. The 3-M Systems are a fact of life   for   any   person   who   is   involved   in   the maintenance  of  a  Navy  ship.  You  will  be  in- fluenced by your ship’s 3-M Systems for as long as you are on duty because these systems will help you  to  keep  your  equipment  and  your  spaces working  for  you. Your  ship’s  3-M  Systems  provide  for  the orderly   scheduling   and   accomplishment   of maintenance.   The   3-M   Systems   include   the reporting of information and the management of maintenance  support  functions.  As  a  senior  Ship’s Serviceman,  you  will  be  involved  with  the  schedul- ing, inspecting, and reporting of any maintenance in  the  activities  under  your  control.  All  the documents  and  procedures  of  the  3-M  Systems will not be discussed in this chapter. For detailed information,  you  should  refer  to  the   Ships’ Maintenance   and   Material   Management   (3-M) Manual,   OPNAVINST  4790.4A.  This  manual consists  of  three  volumes,  but  you,  the  senior Ship’s  Serviceman,  will  probably  be  concerned only  with  volume  1. PMS  SCHEDULES One  reason  for  the  effectiveness  of  the  3-M Systems  is  the  orderly  scheduling  of  preventive maintenance actions. When performed according to  schedule,  these  maintenance  actions  provide  the means of identifying any parts requiring replace- ment  prior  to  failure.  This  type  of  preventive maintenance  curtails  equipment  breakdowns  that might  result  in  repeated  and  costly  corrective maintenance actions. As a senior Ship’s Service- man,  you  will  be  responsible  for  helping  to establish  PMS  schedules  for  the  equipment  and spaces under your control. There are three PMS schedules  with  which  you  will  be  directly  con- cerned:  cycle,  quarterly,  and  weekly.  Let’s  take a  brief  look  at  each  one. Cycle Schedule The cycle schedule displays the maintenance requirements   to   be   performed   between   major overhauls  of  the  ship.  It  contains  the  following information: 1. 2. 3. 4. 5. 6. 7. Ship’s  name  and  hull  number Work  center Effective  date  of  the  schedule A  listing  of  maintenance  index  pages Equipment  name Schedules  of  semiannual,  annual,  and cycle  maintenance  requirements  divided into  quarters  after  overhaul Quarterly,  monthly,  and  known  situation maintenance requirements which must be scheduled  each  quarter The cycle schedule is maintained in the ship’s departmental  office  and  is  used  by  the  department head  for  preparing  the  quarterly  schedules. Quarterly  Schedule The quarterly schedule is a visual display of the ship’s employment schedule and the PMS re- quirements  to  be  performed  during  a  specific 3-month period. The schedule, which is updated weekly  by  the  division  officer,  provides  a  ready reference   to   the   current   status   of   preventive maintenance  for  each  work  center.  Spaces  are  pro- vided for entering the work center, year, quarter after  overhaul,  the  3  months  covered,  main- tenance   index   pages   (MIP)   codes,   and   main- tenance  rescheduled  to  the  next  quarter. Thirteen  columns,  one  for  each  week  in  the quarter, enable the scheduling of maintenance on a  weekly  basis.  Each  column  is  divided  (by  tick marks)  into  7  days.  A  line  drawn  through  the appropriate  marks  represents  “at  sea”  days. Maintenance   requirements   are   transcribed from the appropriate Quarter after Overhaul and Each  Quarter  columns  of  the  cycle  schedule  to  the week  on  the  quarterly  schedule  in  which  the  work can best be accomplished. The quarterly schedule 3-23