Table 5-1.–Part I of the Consolidated Master Cross-Reference List COLUMN  TITLE DATA PRINTED Reference No. A number, other than an activity stock number, used to identify an item of production. Mfr. Code The applicable manufacturer’s assigned five-digit code, as listed in the Cataloging Handbook, H4-2. RNVC (Reference A code indicating whether the reference number is item-identifying or Number   Variation requires additional data to identify the item of supply. Code) National Stock No. The NSN assigned to the reference number. Part II of the C-MCRL presents the same data in National Item Identification Number (NIIN) sequence. OBTAINING MATERIAL Once you have found the stock number, you are read to requisition supplies. Most material is obtained by  requisition,  but  purchase  is  used  to  procure non-standard   material   or   to   meet   emergency requirements. The simplest form of a requisition is merely  a  request  for  material  made  out  on  the appropriate Navy form and drawn at a naval supply activity.  If  material  must  be  obtained  by  open  purchase to fill specialized needs, this also is usually handled by the local supply department or activity. COMPUTERIZED  SYSTEMS There  are  different  computerized  systems  being used   at   sea   and   on   shore-based   activities.   The Shipboard  Uniform  Automated  Data  Processing System,   known   commonly   as   SUADPS,   is   the supply-computerized  system  that  is  used  at  sea. SUADPS is broken down into two subsystems: the Shipboard  Nontactical  Automated  Data  Processing Program I, or SNAP I, which is used on aircraft carriers, and  the  Shipboard  Nontactical  Automated  Data Processing Program II, or SNAP II, which is used on smaller ships. The Uniform Automated Processing System, or UADPS, is the computerized-supply system being used on shore-based activities. REQUISITION  FORMS There  are  a  number  of  requisition  forms  for ordering supplies and services. The form that you should use to requisition materials depends on the supply source, and it also depends on whether your local supply system is manual or automated. For  your  requisition  to  be  processed,  it  must submitted   on   the   correct   form.   The   following requisition forms are the ones used most in the supply system: 1. DoD Single-Line Item Requisition System Document  (Manual),  DD  Form  1348  (6-PT).  This  form is  used  in  manual  supply  systems  for  purchasing standard-stock items (fig. 5-8). 2. Single-Line Item Consumption/Requisition Document  (Manual),  DD Form 1250-l (7-PT). This form is used in manual supply systems for purchasing standard-stock items (fig. 5-9). 3.  NON-USN  Requisition  (4491),  DD  Form 1250-2  (7-PT).  This  form  is  used  in  computerized- supply  systems  for  purchasing  open-purchase  items (fig. 5-10). 4.  Requisition  and  Invoice/Shipping  Document, DD Form 1149 (Multiple Requests). This form is used as a shipping and invoice document and is included with the  material  being  shipped.  After  the  material  is received, the original copy must be signed and returned to the sender (fig. 5-11). When filling out the mechanical forms, use a typewriter or ball-point pen. Do not use a pencil because pencil marks smudge and cause errors during the  requisition  processing.  When  you  are  preparing requisitions, it is not necessary to space the entries within the "tic" marks printed on the forms, but you must get each entry inside the proper data blocks. The communication  zero  (Ø)  is  used  on  MILSTRIP requisitions  to  eliminate  confusion  between  the numeric zero and an alphabetic "O". 5-11