TM  55-1510-221-10 NOTE The  extra  precision  values  are  always added  to  normal  values.  As  an  example, South 4,476.995 m will display “4476 (S)“ in  the  normal  display  and  “995”  in  extra precision  display.  In  other  words,  there  is no  rounding  between  the  two  displays. 12.  Repeat  steps  2  through  11 for  each  waypoint  to  be loaded. NOTE A  load  cycle  may  be  terminated  prior  to insertion   of   all   four   values   by   moving data  selector  or  thumbwheel. (b.) Insertion of geographic waypoint coordinates: 1. Data  selector  -  L/L  WY  PT. Data   displays   indicate   last coordinates   inserted   into   the selected   waypoint. 2 .    T h u m b w h e e l   - Set to waypoint n u m b e r   t o   be loaded. 3. To  load  latitude  -  Press  keys in   sequence,   starting   with “N“  or  “S”  to  indicate  north or  south.  Example:  42°  54.0' North  = N   4   2   5   4   0. Observe that INSERT/ ADVANCE  pushbutton  light illuminates  when  first  key  is pressed,  and  latitude  appears in   left   data   display   as   keys are  pressed. 4.  INSERT/ADVANCE  push- button   -   Press.   Observe pushbutton light extin- guishes. 5.  To  load  longitude  -  Press keyboard  keys  in  sequence, starting   with   “W“   or   “E“ indicating west or  east. Example:  87°54.9’  West  = W  8  7  5  4  9.  Observe  that INSERT/ADVANCE    push- button light illuminates when  first  key  is  pressed, and  longitude  appears  in  dis- play  as  keys  are  pressed. 6.  INSERT/ADVANCE  push- button   -   Press.   Observe 7. 8. 9. 10. 11. 12. pushbutton light extin- guishes. If  desired  to  insert  extra  pre- cision  coordinate  data  -Press INSERT/ADVANCE    push- button.   Observe   that   arc- seconds   for   loaded   latitude and   longitude,   to   nearest tenth  of  a  second,  appear  in left  and  right  data  displays, respectively. To   load   related   arc-second values   for   latitude   -   Press keys   in   sequence,   starting with   “N“.   Example:   35.8“ North   =  N  358. INSERT/ADVANCE    push- button   -   Press.   Observe pushbutton light extin- guishes. To   load   related   arc-second values  for  longitude  -  Press keys   in   sequence,   starting with  “E“.  Example:  20.1“ East  -  E  201. INSERT/ADVANCE    push- button   -   Press.   Observe pushbutton light extin- guishes. Repeat steps -2- through -11- for  each  waypoint  to  be loaded. NOTE In above e x a m p l e ,   if INSERT/ ADVANCE   pushbutton   was   pressed,   the following  normal  display  would  appear: “42°54.5  (N)“  and  87°54.3(W).  The  extra precision  values  are  added  to  normal  val- ues  and  normal  data  displays  are  not rounded   off. NOTE The   normal   geographic   coordinates   must always  be  loaded  prior  to  extra  precision values. NOTE The  directions  “N“  or  “S”  and  “E“  or “W”  are  established  during  normal  coor- dinate  entry.  Either  key  may  be  used  to initiate  entry  during  extra  precision  loads and  values  will  be  added  to  the  extra  pre- cision  value  without  affecting  direction. 3-56