TM 1-1510-223-10 the   fixed   miniature   aircraft   and   the   movable   attitude sphere.        The    inverted    V    shaped    miniature    aircraft symbol is flown to align with the flight director command cue  in  order  to  satisfy  the  commands  of  the  selected flight director mode. (12)   Marker beacon annunciator.  Reception  of  a marker  beacon  signal  is  indicated  on  the  EADI  by  the illumination of the appropriate marker beacon annunciator.    Possible  annunciations  are  outer  marker (0,  blue),  middle  marker  (M,  amber),  and  inner  marker (I, white). (13)   Autopilot   engagement   annunciator.      Auto- pilot   engagement   is   indicated   on   the   EADI   by   an annunciator placarded AP ENG (green). (14)   Radio altitude display.  Radio altitude is pre- sented by a four-digit display from -20 feet to 2500 feet above ground level (AGL). Radio altitude is displayed in blue  numbers  followed  by  RA  in  white  letters.  Display resolution between 200 and 2500 feet AGL is in 10-foot increments. Display resolution below 200 feet AGL is in 5-foot    increments.    The    radio    altitude    display    will disappear  from  the  EADI  when  radio  altitude  is  above 2500 feet AGL (15)   Decision   height   annunciator.      When   radio altitude is less than 100 feet above the selected decision height,  a  white  box  will  appear  adjacent  to  the  radio altitude display. When the aircraft is at or below decision height   an   amber   DH   annunciator   will   be   illuminated inside the white decision height display box on the EADL (16)   Rising   runway   radio   altitude   display.      A miniature     rising     runway     symbol     displays     absolute altitude  reference  above  the  terrain.  The  rising  runway appears at 200 AGL and contacts the aircraft symbol at touchdown. (17)   Inclinometer.  The inclinometer provides the pilot with a display of aircraft slip or skid for coordinating turns. (18)   Expanded   localizer   or   rate-of-turn   pointer and scale.  When the flight director navigation source is other than a localizer frequency, rate-of-turn is displayed by a pointer and scale on the EADL A standard-rate turn (3   degrees   per   second)   is   indicated   when   the   turn needle  is  deflected  until  the  needle  covers  the  left  or right  rate-of-  turn  scale  mark.    When  the  flight  director navigation  source  is  a  localizer  frequency,  the  rate-of- turn  pointer  an  scale  display  will  become  an  expanded localizer   pointer   and   scale   display.      The   expanded localizer  pointer  receives  raw  localizer  data  from  the navigation   receiver.      The   expanded   localizer   pointer becomes an extremely sensitive reference  indicator of aircraft position with respect to the center of the localizer course. From the center of the expanded localizer scale to   the   left   or   right   scale   index   mark   equals   33   feet deviation from the center of the localizer course. NOTE When  back  course  (B3C)  has  been  selected on   the   flight   director,   or   when   the   selected course  is  more  than  90  degrees  from  aircraft heading,    expanded    localizer    deviation    will automatically   be   reversed   to   provide   proper sensing with respect to the localizer centerline, and amplification will be reduced by one half. (19)   Decision  height  display.    Decision  height  is displayed  on  the  EADI  by  a  three-digit  display  in  blue numbers   followed   by   DH   in   white   letters.   Decision heights   may   be   set   into   the   display   by   the   decision height setting control on the respective display controller.  Decision  heights  in  the  0  to  200  foot  range are  set  into  the  display  in  5-foot  increments.  Decision heights  in  the  200  to  990  foot  range  are  set  into  the display in 10-foot increments. (20)   Air  data  command  display.    Flight  director air  data  command  modes  are  vertical  speed  (VS)  or indicated air speed (IAS).  When an air data command mode   has   been   selected   on   the   flight   director   mode selector  panel,  the  command  reference  will  appear  on the  EADI  in  blue  numbers  below  CMD  in  white  letters. The autopilot pitch wheel on the autopilot control panel is   used   to   change   the   air   data   command   reference number when operating in the VS or IAS mode.  When a vertical  mode  other  than  VS  or  IAS  is  selected,  the  air data command display will disappear from the EADI. (21)   Pitch   and   roll   command   cue.      The   flight director    pitch    and    roll    command    cue    displays    the computed  commands  required  to  capture  and  maintain a desired flight path.  The inverted V shaped miniature aircraft  symbol  is  flown  to  align  with  the  flight  director command  cue  in  order  to  satisfy  the  commands  of  the selected flight director mode.  The cue will be removed from  view  if  an  invalid  condition  occurs  in  either  flight director pitch or roll command.  The cue is displayed on the  side  coupled  to  the  flight  director  only,  and  reflects the  flight  director  mode  selected  by  the  flight  director mode selector panel. (22)   Fast/slow  pointer  and  scale.    The  fast/slow pointer  and  scale  provide  a  display  of  deviation  from relative approach speed information provided by the lift computer.    The  information  provided  to  the  indicator  is for  an  approach  speed  of  approximately  1.3  times  V,o The  display  is  removed  from  the  EADI  when  flaps  are extended to the full down position. 3-27