The Technical and Material Assistant The  technical  and  material  assistant,  when assigned, is usually a warrant officer or a limited duty officer. His primary job is to supervise the maintenance and repair of the material, equipment, and systems for which the division is responsible. The  technical  and  material  assistant  has  the following  responsibilities  under  the  division  officer: . Ensure proper performance of preventive and corrective  maintenance  procedures  on  all  equipment, material,  and  systems  assigned  to  the  division. .  Review  for  technical  accuracy  all  completed Maintenance   Data   Collection   System   (MDCS) documents  and  report  the  completion  of  maintenance. . Ensure preparation, maintenance, and timely submission  of  material,  equipment,  and  system  records, reports,  and  logs  required  of  the  division. . Ensure the preparation and timely submission of requests for repairs parts and other materials necessary for  the  efficient  operation  of  the  equipment,  material, and  systems  assigned  the  division. . Ensure repairs to equipment and material of other divisions that are beyond the capacity of those divisions but within the capcity  of his division. l Perform other duties as may be assigned. The Enlisted Personnel While the rating structure is the basis of the Navy’s enlisted  occupational  classification  structure,  it  is supplemented  by  the  enlisted  classification  coding structure. The  Manual  of  Navy  Enlisted  Manpower  and Personnel   Classifications   and   Occupational Standards,  NAVPERS  18068-F,  contains  the  enlisted classification coding structure and is the primary tool for the Navy Enlisted Classification (NEC) coding of manpower  authorizations  and  personnel. NECs must be reviewed and verified to ensure accuracy  and  currency  upon  detachment,  receipt, annual service record verification, change in rate or rating,  separation,  reenlistment,  transfer  to  the  Fleet Reserve,  or  retirement  of  personnel. Enlisted personnel in the engineering department arc  assigned  to  divisions  by  the  engineer  officer according to the ship’s personnel assignment bill. The division  officer  assigns  enlisted  personnel  of  the division  to  battle  station  and  condition  watches according to the ship’s battle bill and to regular duties and watches according to various ship’s bills. THE CHIEF PETTY OFFICERS.—  The  primary duty of the chief petty officer (CPO) is to help the division officer coordinate and administer the division, The CPO uses his experience to develop a thorough understanding  of  the  functions,  directives,  and equipment of the division so he can assume duties in the absence of the division officer. Depending on the division organization and his professional ability, the CPO may assist the division officer in the following duties: . Supervise the preparation and maintenance of the watch, quarter, and station bill and such other bills as may be necessary for the operation of the division. l  Help  formulate  and  implement  policies  and procedures for the operation of the division. .  Supervise  the  division  in  daily  routine,  and conduct  frequent  inspections  to  assure  division functions  are  properly  executed. l Help administer discipline within the division. l Evaluate personnel  and division  officer. .   Provide personnel. individual performances of division recommend  periodic  grades  to  the counsel   and   guidance   to   division . Ensure the proper preparation, maintenance, and submission  of  logs,  records,  and  reports  required  of  the division. . Perform such other duties as may be assigned by the  division  officer  or  other  competent  authority. THE PETTY OFFICERS.— Personnel of the YN and   engineering   and   hull   ratings   make   up   the complement and allowance of petty officers for the engineering department. The engineering and hull ratings were listed under the engineering divisions earlier in this chapter. BTs  operate  marine  boilers  and  fireroom machinery, test and inventory fuels and water; perform preventive  and  corrective  maintenance  of  boilers, pumps, and associated equipment; and prepare and maintain records, reports and logs. HTs plan, supervise, and perform tasks necessary to fabricate, install, and repair all types of shipboard 1-14