. The light-off and securing schedules were prepared  by  each  ship  and  were  not standardized between ships. The schedules were   written   for   general,   rather   than specific,  equipment  or  systems.  They  did not  include  alternatives  between  all  the existing   modes   of   operation. Following these studies, NAVSEA developed the  EOSS.  It  is  designed  to  help  eliminate operational  problems.  The  EOSS  involves  the participation  of  all  personnel  from  the  department head to the watch stander. The EOSS is a set of systematic and detailed written procedures. The EOSS  uses  charts,  instructions,  and  diagrams developed  specifically  for  the  operational  and casualty  control  function  of  a  specific  ship’s engineering plant. The   EOSS   is   designed   to   improve   the operational  readiness  of  the  ship’s  engineering plant.  It  does  this  by  increasing  its  operational efficiency and providing better engineering plant control.  It  also  reduces  operational  casualties  and extends the equipment life. These objectives are accomplished  first  by  defining  the  levels  of control; second, by operating within the engineer- ing plant guidelines; and last, by providing each supervisor  and  operator  with  the  information needed. This is done by putting these objectives in  words  they  can  understand  at  their  watch station. The  EOSS  is  composed  of  three  basic  parts. l  The  User’s  Guide .   The   engineering   operational   procedures (EOP) . The engineering operational casualty con- trol  (EOCC) EOSS USER’S GUIDE The  User’s  Guide  is  a  booklet  that  explains the  EOSS  package  and  how  to  use  it  to  the ship’s best advantage. It has document samples and  explains  how  they  are  used.  It  provides recommendations for training the ship’s person- nel  using  the  specified  procedures. The EOSS documentation is developed using work-study techniques. All existing methods and procedures  for  plant  operation  and  casualty control  procedures  are  documented.  These  include the actual ship procedures as well as those pro- cedures contained in available reference sources. Each  action  is  subjected  to  a  serious  review to  measure  the  completeness  of  the  present methods.  At  the  completion  of  this  analytic  phase, new  procedural  steps  are  developed  into  an operational  sequencing  system.  Step-by-step, time-sequenced   procedures   and   configuration diagrams are prepared to show the plant layout in relation to operational components. The final step in the development phase of an EOSS is a validation  on  board  ship.  This  is  done  to  verify technical accuracy and adequacy of the prepared sequencing  system.  All  required  corrections  are made.   They   are   then   incorporated   into   the package  before  installation  aboard  ship. The resulting sequencing system provides the best  tailored  operating  and  casualty  control procedures  available  that  apply  to  a  particular ship’s  propulsion  plant.  Each  level  is  designed with  the  information  required  to  enable  the engineering  plant  to  respond  to  any  demands placed  upon  it. ENGINEERING   OPERATIONAL PROCEDURES The  EOP  has  all  the  information  necessary  for the  proper  operation  of  a  ship’s  engineering  plant. It  has  guides  for  scheduling,  controlling,  and directing  plant  evolutions  through  operational modes. This includes receiving shore services, to various  modes  of  in-port  auxiliary  plant  steaming, to  underway  steaming. The EOP documentation exists for specifically defined operational stages. These are defined as stages  I,  II,  and  III. Stage I deals with the total engineering plant under  the  direct  responsibility  of  the  plant supervisor (EOOW). The EOOW coordinates the placing in operation and securing of all systems and   components   normally   controlled   by   the various   space   supervisors.   This   person   also supervises those functions that affect conditions internal  to  the  engineering  plant,  such  as  jacking, testing,  and  spinning  main  engines.  The  EOP documentation   helps   the   plant   supervisor guarantee  optimum  plant  operating  efficiency, proper  sequencing  of  events  in  each  evolution,  and the training of newly assigned personnel. During a  plant  evolution,  the  EOOW  appoints  control and  operation  of  the  following  systems  and components: .  Systems  that  interconnect  one  or  more engineering  plant  machinery  spaces  and electrical systems. 1-13