FLIGHT DIRECTOR MODE ANNUNCIATION
Flight director mode annunciations are integral to the primary flight displays. The vertical and lateral
modes are annunciated along the top of the display. Armed vertical and lateral modes are
annunciated in white and appear slightly to the outboard side of the captured vertical and lateral
mode annunciations, which are presented in green. Lateral mode annunciations are located to the
left of top center and vertical modes are annunciated to the right of top center. A white box appears
around a capture or hold mode for five seconds after mode transition. Lateral and vertical mode
annunciations and transitions are listed below:
VOR A NAV mode (VOR) is armed or has been captured and is being tracked.
HDG Heading select mode engaged.
LOC Localizer has been armed or captured.
APR VOR approach selected or course capture has occurred.
GS Glideslope armed or captured.
ASEL Altitude preselect armed.
ALT Altitude hold mode engaged.
BC Back course armed or captured.
VS Vertical speed hold has been selected and captured.
IAS or MACH* Indicated airspeed (or Mach) hold has been selected and captured.
LNAV Long range NAV (FMS) mode has been selected.
VNAV Vertical navigation mode has been either armed or captured.
GA Go-around mode has been selected.
TEST System is in test mode (annunciated in green) Annunciation is automatic
immediately after power up.
*IAS or MACH will be annunciated automatically, depending upon airplane altitude and airspeed.
Transition from IAS to Mach is automatic as the airplane climbs through 29,000 feet altitude or
exceeds 0.620 Mach, and Mach to airspeed occurs automatically as the airplane descends through
28,800 and decreases below 0.610 Mach.
LATERAL TRANSITIONS VERTICAL TRANSITIONS
VOR arm to VOR cap ASEL arm to ALT
LOC arm to LOC cap VNAV armed to VNAV cap
BC arm to BC cap VNAV cap to ALT
APR arm to APR cap ASEL arm to ASEL cap
ASEL cap to ALT
GS arm to GS cap
Cessna Citation XLS - Instrumentation & Avionics
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