PART TIME DISPLAYS
Part time displays are present when selected on the display controller or the flight director mode
selector panel. The mode and bearing pointers available depend upon optional equipment installed
and may not be present in all installations. Some annunciations are also related to other systems,
which will be discussed under headings pertaining to those systems.
Bearing Pointer
and Source
Annunciation
The bearing pointers indicate relative bearing to the selected navaid and can
be selected as desired on the display controller. Bearing pointers appear on
the compass rose when they are selected by means of the knobs on the
display controller, and the bearing pointer source annunciations are in the
lower left of the HSI display. If NAV source is invalid or LOC frequency is
tuned, the NAV bearing pointer and the annunciation will disappear. The “
O”
bearing displays NAV 1, ADF 1, or FMS. The “
(” bearing pointer displays
NAV 2, ADF 2 (if installed), or FMS. In dual FMS installations the “
O” bearing
pointer displays FMS 1 and the “
(” bearing pointer displays FMS 2. In
standard single ADF installations, ADF can be selected on either bearing
pointer.
Elapsed Time
Annunciation
Shows elapsed time in hours and minutes or minutes and seconds.
Selection is made on display controller. Display is green with white label.
Time-to-Go and
Ground Speed
Pressing the GS/TTG button on the display controller alternates time-to-go
(to next waypoint or navaid) and ground speed displays. Display is in color
determined by navaid selection/cross selection; label is white.
Desired Track When long range navigation is selected, the course pointer becomes a
desired track pointer. The long range nav system will position the desired
track pointer. A desired track (DTRK) digital display will appear in the upper
left corner of the HSI display. When FMS is selected, the course selection
knob on the remote instrument controller is inactive. Color of the course
deviation indicator (CDI) and digits will depend upon combination of short
range and long range navigation sources selected.
NAV Source
Annunciation
Appears in the upper right side on the HSI presentation when a NAV (NAV),
ILS (ILS), or FMS (FMS) source is selected as a navigation source. Distance
to next waypoint or to selected VORTAC appears below the annunciation.
Source will be annunciated by the color code of the annunciations and HSI
course deviation indicator (CDI). Yellow means “same side” or “cross side”
selection of both sources, and green means normal “on side” selection.
Labels will be white.
Wind Display The wind display (magenta direction and arrow) is located at the lower left-
center of the display when FMS is selected for navigation. In single FMS
installations, the wind display will be in magenta unless both sides are
selected to FMS, in which case the display will be yellow.
Cessna Citation XLS - Instrumentation & Avionics
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