sent back to the customer activity to be used the next time another transaction is to be completed. Accurate data, completeness, and legibility in filling out the meter card is essential. Remember a computer CANNOT think! FORMAT  310 This  report  is  sent  to  you  every  month  and  is  an inventory  of  all  your  items,  including  overdue  and delayed items. If you have any additions, deletions, or corrections to this format, submit them to the MOCC on either  the  METER  card  or  on  the  Add-On-Inventory form. FORMAT  350 Figure 1-6.—CAUTION tag. This report is also sent to you monthly and is for i n f o r m a t i o n   p u r p o s e s .   I t   i s   p r e p a r e d   i n   a customer/subcustodian sequence to readily identify all items held on subcustodian basis by other activities. This format is produced concurrently with format 310. Both formats 310 and 350 will have the last calibration dates of all items and the due dates of their calibrations. FORMAT  802 Format 802 is a recall schedule. It is updated and distributed monthly. It tells you what equipment is due for calibration that month. It is sequenced by customer activity,   by   subcustodian,   and   by   calibration laboratories. EQUIPMENT AND INSTRUMENT TAG-OUT Whenever you make repairs, you will be required to isolate  and  tag-out  that  equipment  or  section  of  the system. The tag-out program provides a procedure to be used when a component, piece of equipment, system, or portion of a system must be isolated because of some abnormal  condition.  The  tag-out  program  also  provides a  procedure  to  be  used  when  an  instrument  becomes unreliable  or  is  not  operating  properly.  The  major difference  between  equipment  tag-out  and  instrument tag-out is that tags are used for equipment tag-out and labels are used for instrument tag-out. Tag-out   procedures   are   described   in   Standard Organization   and   Regulations   of   the   U.S.   Navy, OPNAVINST  3120.32B.  and  represent  the  minimum requirements  for  tag-out.  These  procedures  are mandatory  and  are  standardized  aboard  ships  and  repair Figure  1-7.–DANGER  tag. activities.  The  following  definitions  are  used  in  the tag-out  bill: 1.   Authorizing   officer-This   individual   has   the authority to sign tags and labels and to have tags and labels  issued  or  cleared.  The  authorizing  officer  is always   the   officer   responsible   for   supervising   the tag-out   log.   The   commanding   officer   designates authorizing  officers  by  billet  or  watch  station.  The authorizing  officer  for  engineering  is  normally  the EOOW  underway  and  the  engineering  duty  officer (EDO) in port. 2.   Department duty officer (DDO) (repair activities only)-This  individual  is  designated  as  DDO  on  the approved watch bill or plan of the day. 1-10