Cockpit Reference Guide

Garmin G1000 Cockpit Reference Guide for the Cessna Nav III
190-00384-07 Rev. A
SECTION 6 – AUTOMATIC
FLIGHT CONTROL
6-29
Vertical Path Tracking descent to VNV
Target Altitude:
1) Select VNV flight control:
a) Press the
VNV Key to arm Vertical Path
Tracking Mode. The white annunciation ‘VPTH’
appears.
b) Using the ALT Knob, set the Selected Altitude
at least 75 feet below the VNV Target Altitude
of 10,000 feet.
c) If Vertical Path Tracking Mode is armed more
than 5 minutes prior to descent path capture,
acknowledgment is required for the flight
director to transition from Altitude Hold to
Vertical Path Tracking Mode. To proceed
with descent path capture if the white ‘VPTH’
annunciation begins flashing, do one of the
following:
• Press the VNV Key
• Turn the ALT Knob to adjust the Selected
Altitude
Figure 6-35 VPTH Descent
OPSHN
3 nm
Cruise Altitude of 12,000 MSL
VNAV Target Altitude of 10,000 MSL
ALT Mode
VPTH Mode
Selected Altitude (set below VNAV Target Altitude)
1
2
3
TOD
BOD
ALT Mode
If the descent is not confirmed by the time of
interception, Vertical Path Tracking Mode remains
armed and the descent is not captured.
2) When the top of descent (TOD) is reached, the
flight director transitions to Vertical Path Tracking
Mode and begins the descent to the VNV
Target Altitude. Intention to capture the VNV
Target Altitude is indicated by the white ‘ALTV’
annunciation.
3) As the aircraft nears the VNV Target Altitude, the
flight director transitions to VNV Target Altitude
Capture Mode, indicated by the green ‘ALTV’
annunciation flashing for up to 10 seconds.
The green ‘ALT’ annunciation flashes for up to
10 seconds upon reaching 50 feet from the
VNV Target Altitude; the autopilot transitions to
Altitude Hold Mode and levels the aircraft at the
vertical waypoint.