TM 1-1510-224-10 CAUTION A    run-off    error    sometimes    occurs    in    these receivers.    The  following  procedures  should  be used  when  loading  crypto  keys  (GUV  or  CVW): After key loading and once the receiver indicates FOM   I   or   2,   the   operator   should   cycle   the receiver to   INIT  and  then  back  to    NAV.      This action resets the corrupted data and will recover normal operations.  Note that this is a peacetime environment solution. (2) GPS initialization mode. Successive depressions of RI will cause the GPS mode to toggle from NAV  to  INIT,  with  the  active  mode  boxed.    Normally,  on power-up,   a   BIT   runs   for   approximately   30   seconds, followed by the nav legend automatically being boxed and the legend  QUICK, NORMAL, or  COLD  (indicating  start- up  mode)  being  displayed  to  the  right  of  the  text  at  L5. Valid year data is I or two digits in the range 0 through 99. If GPS data displayed is not correct, depress RI to select INIT and correct data as follows: (a) GPS position data insertion. 1. If   position   is   not   correct,   enter position data into the scratchpad. Valid position data is X.DD.MM.SS.T Y.DDD.MM.SS.T, where: X = Latitude Hemisphere (N or S) DD = Degrees of Latitude (0 90) MM = Minutes of Latitude or Longitude SS = Seconds (0O59) T = Tenths of Seconds (0 9) Y = Longitude Hemisphere (E or W) DDD = Degrees of Longitude NOTE Zero   is   assumed   for   minutes   and seconds if not entered. If   INS   is   in   NAV,   its   position   and altitude will be sent to the GPS in INIT and displayed next to LI. 2. L1 line selection switch Depress. With valid data in the scratchpad and GPS in the INIT mode, depressing LI will cause the scratchpadded data to be displayed to the right of the text at L1. (b) GPS altitude data insertion. 1. If  altitude  data  is  in  error,  enter valid altitude data into scratchpad. 2. L2 line selection switch Depress. With valid data in the scratchpad and GPS in the INIT mode,  depressing  L2  will  cause  the  scratchpadded  data to be displayed to the right of the text at L2.  Valid altitude data is 1 thru 5 digits with a range of 0 99999. NOTE The units of altitude for GPS are feet MSL. (c) GPS time data insertion. 1. If time data is in error, enter valid UTC time data into scratchpad. 2. L3 line selection switch Depress. With  a  valid  time  entered  in  the  scratchpad  and  GPS in    the     INIT     mode,     depressing     L3     will     cause     the scratchpadded data to be displayed to the right of the text at L3.  Valid time is HH MM SS, where: HH = Hour of the day (0 23) MM = Minutes after the hour (0 59) SS = Seconds after the minute (0 59) NOTE Zero   is   assumed   for   minutes   and seconds if not entered. 3. Day of year (DOY) data insertion. 4. Enter   valid   day   of   year    (DOY) data into scratchpad. 5. L4 line selection switch Depress. With    a    day    of    the    year    (DOY)    entered    in    the scratchpad and GPS in the  INIT mode, depressing L4 will cause the scratchpadded data to be displayed to the right of the text at LA.  Valid day of the year data is I through 3 digits in the range of 1 through 365. (d) Year data insertion. 1. If  year  is  wrong,  enter  valid  year data into scratchpad. 2. L5  line  selection  switch  Depress. With     a     year     entered     in     the scratchpad  and  GPS  in  the  INIT mode, 3-77