Refer  to  OPNAVINST  4790.2  (series)  for  more information about the AMMRL program. Custody Codes This is a single alpha character code that provides supplemental  accountability  details  about  an  SE transaction.  Also,  it  shows  the  effects  of  transactions  on supply  and  financial  records.  The  codes  identify  a specific category of SE items placed in the custody of an  intermediate  maintenance  activity  (IMA).  IMA issues the items to other activities on a subcustody basis. The following paragraphs describes the custody codes. Code  D  is  assigned  to  items  listed  only  in  a detachment  list  code,  requiring  management,  and having  custody  code  of  P  or  E.  Code  D  will  take precedence  in  IMRL  printing.  The  issuing  of  allowances for items coded D is done in the same manner as the P-coded item. For example, code D would apply to items required   on   air   capable   ships   by   deployable detachments. Code E is for items used infrequent y (less than once per month). It means the item is available from the supporting IMA as required. The IMA makes the item available to activities. After use, the activities return the item to IMA. Code  M  is  for  noncalibratable  items  requiring management  that  are  not  otherwise  custody  ceded.  The quantity authorized for these items is the total quantity required for subcustody by each activity supported. An example of an M-coded item is a carrying case for a calibratable item when it is listed in the source data as a separate end item. There are two steps for assigning items  in  code  M.  First,  the  support  equipment controlling  authority  (SECA)  identifies  the  item. Second, NAVAIRENGCEN assigns code M to the item. Code N is automatically assigned to items that do not   require   calibration   or   management,   and, consequently,   not   otherwise   coded.   Code   N   is automatically  entered  if  the  maintenance  level  is intermediate  (I). Code P is for items weighing over 200 pounds (over 300  pounds  for  wheeled  equipments).  When  authorized for  a  supporting  IMA,  the  IMA  or  MALS  contingency support  package  quantity  is  the  total  quantity  required for subcustody to each O-level maintenance activity. The items are issued on a subcustody basis to squadrons for  full-time  utilization.  The  squadron  returns  the  item to the IMA prior to deployment. While deployed, the new supporting IMA issues these items to embarked squadrons. Code L is for all items requiring calibration and management. These are items designated for use at O-level maintenance and not already coded D, E, or P. The quantity authorized is the total quantity required for subcustody by each activity supported. The O-level activities  retain  the  items  when  deployed. Individual Material Readiness List The  IMRL  is  a  consolidated  allowance  list  of authorized quantities of SE items. These are items required   by   an   activity   to   perform   its   assigned maintenance  level  functions.  The  following  paragraphs describe  the  terms  used  in  IMRL. Support   eguipment   (SE)  refers  to  IMRL  and non-IMRL  equipment  required  to  make  a  system, subsystem,  or  end  item  equipment  operational. The  Primary   Support   Equipment   Controlling Authority   (PSECA)   is   the   term   applied   to COMNAVAIRSYSCOM.   The   COMNAVAIRSYS- COM   functions   as   the   centralized   SE   inventory management  authority.  PSECA  is  responsible  for coordinating distribution of in-use assets among the SECAs.  Also,  PSECA  is  responsible  for  prioritization of SE procurement and distribution of new SE. SECA  is  the  term  applied  to  major  aviation commands  that  exercise  administrative  control  of AMMRL  Program  SE  end  items.  SECA  performs  the allowance and inventory control of these items. The following is a list of designated SECAs: .   Commander,   Naval   Air   Force,   Atlantic (COMNAVAIRLANT) .   Commander,   Naval   Air   Force.   Pacific (COMNAVAIRPAC) l Chief of Naval Air Training (CNATRA) .  Commander,  Naval  Air  Reserve  Force (COMNAVAIRRESFOR) .  Naval  Air  Maintenance  Training  Group (NAMTRAGRU) .  Commander,  Naval  Air  Systems  Command (COMNAVAIRSYSCOM) NOTE: COMNAVAIRSYSCOM  has  designated Commanding  Officer,  Naval  Aviation  Maintenance Office  (NAMO)  to  execute  SECA  functions  for  all NAVAIR field activities and depots. NAMO also has SECA functions for naval weapons stations with SE supplied  by  NAVAIR  under  the  scope  of  the  AMMRL program. 8-20