the   original   and   one   copy   for   each   item   of controlled equipage in the custody of each depart- ment  head. Department  heads,  at  their  discretion,  may prepare  additional  duplicate  custody  records  for ‘any  signature  required  item  such  as  binoculars, watches, and so on, when it is desired to assign custodial responsibility for the same item to more than  one  individual. MAINTENANCE   OF NAVSUP  FORM  306 The  originals  of  the  NAVSUP  Form  306  are maintained in a space designated as most conve- nient by the supply officer and, when not in use, must be kept in a locked file. Entries relative to receipts,  expenditures,  and  inventories  are  posted to  NAVSUP  Form  306  according  to  Afloat Supply  Procedures,  NAVSUP  P-485,  paragraph 6092.   When   a   new   NAVSUP   Form   306   is required,  the  information  from  the  old  card  is duplicated  and  after  the  balance  is  brought forward to the new NAVSUP 306, the old NAV- SUP Form 306 must be kept for 36 months from the date of the last inventory entry appearing in the  inventory  record  section. When  items  are  designated  as  controlled equipage  by  the  commanding  officer  or  TYCOM according  to  NAVSUP  P485,  paragraph  6091-3, the   notation   CO  designated  item  or  TYCOM designated item, as appropriate, must be entered in  the  top  or  bottom  margin  of  the  NAVSUP Form  306. PHYSICAL  INVENTORY  OF CONTROLLED   EQUIPAGE All  controlled  equipage  items  must  be  in- ventoried  annually  during  the  period  15  February through 15 March. Other inventories, which must be completed within 30 days after the commence- ment  date,  are  listed  as  follows: 1.  On  commissioning,  inactivation,  or  re- activation  of  the  ship 2.  On  relief  of  a  head  of  department,  for those  items  in  the  custody  of  the  department concerned 3.  On  change  of  command,  at  the  discretion of  the  relieving  commanding  officer When  a  shipwide  inventory  of  all  controlled equipage  has  been  taken  during  the  6-month period   preceding   15   February,   the   annual inventory  requirement  for  the  current  year  is  con- sidered satisfied. PUBLICATIONS Normally, the technical library for the supply department  is  established  within  the  supply support  center  (SSC).  As  the  AK  assigned management   responsibility   for   the   technical research unit, you must determine the technical manuals and publications required to support the organization  and  maintain  receipt  and  distribu- tion   control.   You   must   also   be   responsible for   making   sure   changes   and   revisions   are incorporated to keep the publications current and up to date. Once established, the majority of the manuals  and  publications  are  placed  on  automatic distribution  to  your  activity. There  are  many  general  use  manuals,  publica- tions,  and  directives  that  are  used  by  aviation supply  personnel  to  determine  standard  supply operating procedures and to obtain management data relative to material identification, material requisitioning,   and   processing   of   repairable components. The manuals and publications that should  be  maintained  in  a  technical  library  are covered  in  the  following  paragraphs. NAVY   COMPTROLLER   MANUAL The Navy  Comptroller  (NAVCOMPT)  Man- ual provides  policy,  regulation,  and  procedures within the area of primary support responsibility and technical guidance of the Comptroller of the Navy. There are 10 volumes of the  NAVCOMPT Manual. Volumes 2 and 3 are of primary concern for  the  technical  library. Accounting   Classification,   volume  2.  This volume  is  a  reference  book  that  contains  the classification necessary to report the receipt and expenditures of public funds in each of the three phases  of  the  Navy  accounting  system.  It  also includes   appropriation,   cost,   and   property accounting. Unit Identification Codes,  volume 2, chapter 5. This chapter includes unit identification codes (UICs) for all activities, ships, aviation units, and other  organizational  components  of  the  Navy. This chapter is issued as a separate volume. Appropriation,  Cost,  and  Property  Account- ing, volume 3. This volume prescribes accounting procedures   in   connection   with   appropriation, cost, and property accounting for field activities. As a manual of the Navy accounting system, this 1-12