TM 55-1510-219-10 NOTE L/L   WYPT:   A   coordinate   is   the addition   of   values   for   degrees, whole minutes and seconds. EXAMPLE: W87°  54' 58.6" = 870 54.9W and 58.6. UTM   WYPT:   A   coordinate   is   the   addition   of   the values for kilometers and meters. EXAMPLE: S 2,474,706m = 2474 S and 706. (t) TACAN station data: 1. Data   selector   L/L   WYPT   or UTM WYPT. 2. Keys "7" and "9" Press simultaneously. 3. Waypoint thumbwheel Set desired TACAN station. (Observe  number  of  TACAN  station  being  used  for navigation flashes on and off.) (L/L    WYPT:    Latitude    and    longitude    of    desired TACAN  station,  to  tenth  of  minute,  appears  in  left  and right data displays, respectively.) (UTM   WYPT:   Northing   and   zone   with   easting   of desired  TACAN  station,  to  a  kilometer,  appear  in  left and right data displays, respectively.) 4. INSERT/ADVANCE pushbutton   Press.      Observe following: (L/L WYPT: The arc-seconds related to desired TACAN station, to tenth of arc-second, appear in left and right data displays, respectively.) (UTM WYPT: The extra precision display related to desired TACAN station northing and easting, in meters, appear in left and right data displays, respectively.) NOTE Direction   is   indicated   in   normal data displays. NOTE L/L   WYPT:   A   coordinate   is   the addition   of   values   for   degrees, whole minutes, and seconds. EXAMPLE:   W   87°   54'   58.6"   will   be   displayed   as "87°54.9 W" and "58.6". UTM  WYPT:  A  coordinate  is  the  addition  of  values for kilometers and meters. EXAMPLE: S 2,474,706 m will be displayed as "2474 S" and "706". 5. INSERT/ADVANCE pushbutton Press. (Observe TACAN station altitude, in feet, will appear in right data display; degree symbol and decimal points should be disregarded.  Left data display is blank.) 6. INSERT/ADVANCE pushbutton Press. (Observe  TACAN  station  channel  number,  in  whole numbers, will appear in left data display; degree symbol and  decimal  point  should  be  disregarded.    Right  data display is blank.) NOTE If   INSERT/ADVANCE   pushbutton is pressed, the normal coordinates  indicated  in  step  (3) will be displayed. NOTE Waypoint    thumbwheel    may    be moved   at   any   time   and   normal coordinates for new TACAN station will be displayed. 7. Data  selector  Momentarily  to any   position   other   than   L/L WYPT, UTM WYPT or DIS/TIME.      (Returns   INS   to normal operation.) (u) Magnetic heading. 1. Data selector HDG/DA. (Observe  true  heading  to  nearest  tenth  of  a  degree appears   in   left   data   display.      Drift   angle   to   nearest degree appears in right data display.) 2. Keys "3" and "9" Press simultaneously and hold. (Observe   magnetic   heading   to   nearest   tenth   of   a degree    appears    in    left    data    display.        Drift    angle continues to be displayed in right data display.) 3. Keys "3" and "9" Release. (Observe  left  data  display  reverts  to  true  heading.) 3-62