Garmin G1000 NXi, Руководство пилота

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190-02177-02 Rev. A
Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
215
FLIGHT MANAGEMENT
5.7 VERTICAL NAVIGATION
NOTE: The system supports vertical path guidance and altitude constraints for the following leg types: AF,
CD, CF, CI, CR, DF, FC, FD, PI, RF, and TF. Altitude constraints are not retained in stored flight plans.
The system Vertical Navigation (VNV) 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.
Vertical navigation is available for flight control operations when valid VNV data is entered in flight plan, and
the ENBL VNV Softkey is selected (softkey label changes to ‘Cncl VNV’ once enabled) on the ‘FPL – Active Flight
Plan’ Page. Refer to the AFCS Section for more information on activating the flight director and using the vertical
navigation mode.
The system allows a vertical navigation direct-to for any waypoint in the active flight plan with an altitude
constraint “designated” for vertical guidance. Selecting the
VNV Direct-to
Softkey on the Active Flight Plan Page
allows the flight plan to be flown, while vertical guidance based on the altitude constraint at the VNV direct-to
waypoint is provided. The altitude change begins immediately and is spread along the flight plan from current
position to the vertical direct-to waypoint, not just along the leg for the direct-to waypoint. A direct-to with
altitude constraint activated by pressing the
¯
Key also provides vertical guidance, but would bypass flight plan
waypoints between the current position in the flight plan and the direct-to waypoint. A top of descent (TOD)
point is computed based on the default flight path angle; descent begins once the TOD is reached
Canceling vertical navigation results in vertical deviation (V DEV), vertical speed required (VS REQ), and
time to top of descent/bottom of descent (TOD/BOD) going invalid. The Vertical Deviation Indicator (VDI) and
Required Vertical Speed Indicator (RVSI) on the PFD are removed, and the V DEV, VS REQ, and TOD items
displayed in the Active VNV Profile box are dashed. VNV remains disabled until manually enabled. Vertical
guidance in reversionary mode can only be enabled for a direct-to waypoint.
NOTE: VNV is inhibited while automatic waypoint sequencing has been suspended.
Figure 5-59 Enabling/Disabling Vertical Navigation
Cncl VNV Softkey
Active Vertical Navigation Profile
Disabled (fields dashed)
ENBL VNV Softkey
Active Vertical Navigation Profile
Enabled (valid data)