The  record  position  23-24  contain  the  abbreviated unit of issue for-the material. The  record  positions  25-29  contain  the  quantity  of material shipped to the activity. The record positions 30-43 contain the document number  of  the  requisition. The  record  position  44  may  contain  a  Suffix  code, when  applicable. The  record  positions  45-50  contain  the  supple- mentary  address  from  the  requisition. The  record  position  51  contains  the  Hold  code, when applicable. Refer to Appendix 17 of NAVSUP P485 or Appendix 8U of NAVSUP P-567 for a list of Hold  codes. The  record  positions  52-53  contain  the  Fund  code of  the  requisition. The  record  positions  55-56  contain  the  cognizance symbol of the material. The record positions 57-59 contain the shipment date. The  record  positions  60-61  contain  the  priority designator  from  the  requisition. The record positions 62-76 may be blank. When used,  they  contain  the  transportation  control  number (TCN), government bill of lading (GBL), and registered or certified mail numbers that apply. The  record  position  77  contains  the  Mode  of Shipment  code.  Refer  to  Appendix  A7  of  NAVSUP P-437 for a list of Mode of Shipment codes. The record positions 78-80 contain the date material is available for shipment or port of embarkation. When appropriate to the Media and Status code of the requisition, the shipping status may be provided in a message format. The format of the shipment status sent by message is the same as the supply status. When sent in  abbreviated  format,  it  will  contain  the  following information in sequence. Document  identifier Quantity Document  number Suffix  code,  if  applicable Date shipped or released to carrier Priority  designator l  TCN,  GBL,  registered  or  certified  mail  number l Mode of Shipment code See figure 4-5 for a sample of an abbreviated MILSTRIP message. REQUISITION  MONITORING As  an  AK  you  will  be  involved  in  maintaining current  information  for  outstanding  requisitions  on  file. File maintenance includes monitoring those requisitions in  the  outstanding  file.  Some  of  the  information  to consider before taking action on a requisition is the type and date of the latest status received. This information will help you decide the next action to take. TYPES  OF  FOLLOW-UP There are four types of follow-ups. The following paragraphs  describe  the  different  types  of  follow-ups. Refer to Appendix A4 of NAVSUP P-437 for a list of Document  Identifier  codes  used  in  this  chapter. The  first  type  of  follow-up  is  submitted  to  update the  requisition  status  previously  received.  These follow-up  inquiries  contain  document  identifier  AF followed by numbers 1 through 9. In some cases, the requisition  receives  a  BF  status  after  submission  of  the AF series follow-up. When this happens, submit an AT series follow-up to the supply source. The  second  type  is  the  follow-up  submitted  to  get the latest status, and it maybe processed as a requisition. The  supply  source  will  process  this  document  as  a requisition when there is no record of receipt of the original  requisition.  This  follow-up  inquiry  contains  the document  identifier  AT  series  followed  by  numbers  or letters. The third type is the follow-up submitted as a supply action to improve estimated shipping date (ESD) from previously finished status documents. This follow-up inquiry contains document identifier AFC. The AFC follow-up  applies  only  to  requisitions  with  priority designators 01-08. It will be submitted only after receipt of an ESD that will not meet the material usage or need dates.  Only  the  requisitioner,  supplementary  addressee, or the activity contained in record position 54 of the requisition may submit this follow-up. The fourth type is the follow-up submitted to obtain the  latest  status  on  a  previously  submitted  cancellation request.  This  type  may  be  processed  as  a  cancellation request if the original was not received. This follow-up contains document identifier AK series. 4-15