Garmin G2000 Pilot’s Guide for the Cessna T240
190-01263-01 Rev. A
280
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5.7 vertical navigation
note:
The system supports vertical navigation for all lateral leg types except for CA, CI, FA, FM, HA, HM, PI,
VA, VD, VI, VR, and VM. Vertical constraints are not retained in stored flight plans.
The system Vertical Navigation (VNAV) feature provides vertical profile guidance during the enroute and
terminal phases of flight. Guidance based on specified altitudes at waypoints in the active flight plan or to a
direct-to waypoint is provided. It includes vertical path guidance to a descending path, which is provided as a
linear deviation from the desired path. The desired path is defined by a line joining two waypoints with specified
altitudes or as a vertical angle from a specified waypoint/altitude. The vertical waypoints are integrated into the
active flight plan. Both manual and autopilot-coupled guidance are supported.
note:
Making course changes greater than 90° during a descent with vertical guidance may cause excessive
and rapid movement of the vertical deviation indicator and SVS Pathways.
The system updates vertical path guidance continuously using ground speed and the calculated distance to
the Bottom of Descent (BOD). Due to turn anticipation guidance (turn-smoothing), distance to the BOD can be
affected by course changes greater than approximately 5 degrees. Ground speed can be affected by factors such as
shifts in wind direction, aircraft power management, pitch angle, and course changes. Abrupt and/or substantial
changes to either the distance to the BOD, ground speed, or both can cause similarly abrupt/substantial changes
in vertical path guidance.
Because of turn-smoothing, changes to both distance to the BOD and ground speed tend to be more extreme
when the BOD is also a waypoint that marks a large course change. These speed and distance changes will be
accounted for in the computed required vertical path and reflected in the vertical guidance indications.
VNAV
Enabled
Button
-VNAV Enabled
Figure 5-132 VNAV Profile Screen - Enable/Disable VNAV
VNAV
Enabled
Button
-VNAV
Disabled
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