Autopilot Operation
8-18 SkyView HDX Pilot’s User Guide – Revision B
HSI Source HSI SRC
Press this button to cycle the HSI through the different navigation data sources that are
connected to the SkyView system (e.g., GPS 1-4, NAV 1-4, or custom names that may be
configured). The source displayed on the HSI is the guidance for the Autopilot in NAV and VNAV
modes.
NAV
When the aircraft is approximately on course, this control activates and deactivates the NAV
(navigation) mode for lateral guidance when a suitable navigation source is available. If the
aircraft is not yet on course, this control will arm and de-arm the NAV mode. NAV can be armed
before the aircraft is positioned on an intended course lateral navigation transitions to be
armed in advance.
VNAV
When the aircraft is in a position to intercept a vertical course, this control arms and de-arms
the VNAV (vertical navigation) mode for vertical guidance when a suitable navigation source is
available. If the aircraft is very near the vertical course, selecting the VNAV control may direct
activate and deactivate the mode. VNAV can be armed before a valid glide slope indication has
been established to allow GPS to ILS transitions to be armed in advance.
IAS
Activates and deactivates the Indicated Airspeed mode for pitch axis control during altitude
changes.
IAS will be unavailable and grayed-out if the autopilot is outside of its allowable engagement
speed ranges.
NOSE UP/DOWN
Increments the commanded vertical transition rate when either the VS (Vertical Speed) or IAS
(Indicated Airspeed) modes are selected.
Each press of these buttons will perform the following action:
• NOSE UP:
o In VS mode: increase the (positive) target vertical speed rate in 100 fpm increments,
thereby raising the aircraft’s nose for a climb.
o In IAS mode: decrease the target indicate airspeed by 1 kt increments (or the selected
speed unit), thereby raising the aircraft’s nose for a climb.
• NOSE DOWN:
o In VS mode: decrease the (negative) target vertical speed rate in 100 fpm increments,
thereby lowering the aircraft’s nose for a descent.
o In IAS mode: increase the target indicate airspeed by 1 kt increments (or the selected
speed unit), thereby lowering the aircraft’s nose for a descent.
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