TM 1-1510-225-10 3B-19 (8)   Course    Source    Annunciations.        The navigation  sensor  is  annunciated  in  white  at  the  right center   of   the   display.      The   possible   course   source annunciations are as follows: 1.   FMS 1 or FHDG 1 2.   FMS 2 3.   VOR 1, LOC 1, or BC 1 4.   VOR 2, LOC 2, or BC 2 The   NAV   source   label   is   displayed   in   yellow when a cross-side source is selected.  When both the on-side  and  cross-side  displays  have  the  same  NAV source   selected,   the   NAV   source   label   is   boxed   in yellow. If a NAV sensor failure is detected while selected as     the     course     source,     the     sensor     annunciator becomes red and boxed. If   FMS   1   is   selected   and   a   FMS   NAV   Warn occurs,  the  FMS  1  course  source  annunciator  turns yellow. If FMS 1 is selected as the  primary source, the FMS mode is annunciated in white below the primary navigation  source.    The  FMS  1  modes  are  NONE, APPR,  ENRT,  OCNC,  or  TERM.   The  FMS  mode  will flash     for     10     seconds     starting     1     mile     prior     to transitioning   into   APPR   mode.      When   the   mode   is NONE or ENRT the annunciation field will be blank. If  the  FMS  2  course  is  selected  as  the  primary source  then  the  FMS  mode  is  annunciated  in  white below  the  course  source.    The  FMS  2  course  modes are ENRT, APPR, or TERM.  The FMS mode will flash for  10  seconds  during  the  transition  from  TERM  to APPR.    When  the  mode  is  ENRT  the  annunciation field will be blank. (9)   FMS  Flight  Modes.    If FMS 1 is selected as the primary source, the FMS mode is annunciated in  white  below  the  primary  navigation  source.    The FMS 1   modes  are  NONE,  APPR,  ENRT,  OCNC,  or TERM.      The   FMS   mode   will   flash   for   10   seconds starting 1 mile prior to transitioning into APPR mode.   When  the  mode  is  NONE  or  ENRT  the  annunciation field will be blank. If  the  FMS  2  course  is  selected  as  the  primary source,  the  FMS  mode  is  annunciated  in  white  below the  course  source.    The  FMS  2  course  modes  are ENRT, APPR, or TERM.  The FMS mode will flash for 10 seconds during the transition from TERM to APPR.   When the mode is ENRT the annunciation field will be blank. (10)   Data Selection Display (Navigation Data). The    DATA   switch   on   the   control   panel   provides sequential  selection  of  the  following  data  from  the  on- side   FMS:   OFF,   GS,   TAS,   TTG,   ET,   or   OFF   (no navigation   data   displayed).      The   selected   data   is displayed in white in the lower right hand corner of the display.  When the data is invalid, the digital value is replaced  with  red  dashes.    If  the  data  is  unavailable, the data value is blanked. (a)  FMS -800  Operation.     OFF,  GS,  AS, TTG, and ET are valid data displays for the FMS-800. (b)  KLN  90B  Operation.     OFF,  GS,  and TTG are valid data displays for the KLN 90B. (11)   Course  Pointer.    The  selected  course  is shown by the relationship of the solid single bar arrow (pointer)   with   respect   to   the   compass   card   and   is repeated  numerically  in  the  upper  right  corner.    The course pointer is white for all navigation sources.  The digital course readout and course needle change by 1 increments   and   rotate   such   that   the   needle   head points to the selected primary course on the compass. (12)   Wind  Direction.    The  MFD  displays  wind velocity  (knots)  and  direction  (degrees)  on  the  bottom of the MFD in green below the label WIND.  If no wind data  is  available,  the  data  will  be  blank.    If  the  wind data is invalid, the data will be dashed red. (13)   Compass   Rose   (360°).      The   compass rose provides a graphical representation of the current heading    of    the    aircraft.        It    is    a    full    360    rose approximately 3 inches in diameter with   N,  E,  S, and W, designating the cardinal points and numerics at the 30 points.  Aircraft heading is read against the lubber line.    Major  division  marks  are  every  10  and  minor division marks are every 5 on the compass rose.  The compass   card,   lubber   line,   and   reference   lines   are white. (14)   Bearing  Pointer.    The  bearing  source  is selected  by  the  bearing  switch  on  the  control  panel.   The  bearing  arrow  is  a  solid  cyan  line  with  an  open arrow   extending   through   the   aircraft   symbol   to   the minor  tick  marks  on  each  side  of  the  compass.    The arrowhead points to the compass location corresponding to the bearing of the station. (15)   Benchmark.        A    compass    benchmark surrounds  the  compass  rose.    The  benchmarks  are white triangle marks located every 45  except  at  360 along the outside of the compass rose.