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• Within 31 nm of the destination airport (terminal area), the CDI scale gradually ramps down from 2.0 nm to 1.0 nm over a distance of 1.0 nm, except under the following conditions:
- When navigating with an active arrival route, the flight phase and CDI scale does not change until the aircraft arrives at the first waypoint in the arrive route (if within 31 nm from the destination airport).
• During approach, the CDI scale ramps down even further (see Figures 2-31 and 2-32). This transition normally occurs within 2.0 nm of the Final Approach Fix (FAF). The CDI switches to approach scaling automatically once the approach procedure is active or if Vectors-To-Final (VTF) are selected.
- If the active waypoint is the FAF, the ground track and the bearing to the FAF must be within 45° of the final approach segment course.
- If the active waypoint is part of the missed approach procedure, the active leg and the preceding missed approach legs must be aligned with the final approach segment course and the aircraft must not have passed the turn initiation point.
68 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Flight Instruments
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Figure 2-31 Typical LNAV and LNAV+V Approach CDI Scaling1.0 nm2 nm350 ftangle setby system0.3 nmFAFCDI Full-scale DeflectionCDI scale is set to the smaller of 0.3 nmor an angle set by the systemCDI scale varies if VTF is activatedFigure 2-32 Typical LNAV/VNAV and LPV Approach CDI Scaling1.0 nm2 nmFAF0.3 nmcourse widthLandingThresholdCDI Full-scale Deflectionangle basedon databaseinformationCDI scale varies if VTF is activated
• When a missed approach is activated, the CDI scale changes to 0.3 nm.
• The system automatically switches back to terminal mode under the following conditions:
- The next leg in the missed approach procedure is not aligned with the final approach path
- The next leg in the missed approach procedure is not a CA, CD, CF, CI, CR, DF, FA, FC, FD, FM, IF, or TF leg
- After any leg in the missed approach procedure that is not a CA or FA leg
Flight Phase
Annunciation*
Automatic CDI Full-scale Deflection
Departure
DPRT
0.3 nm
Terminal
TERM
1.0 nm
Enroute
ENR
2.0 nm
Oceanic
OCN
2.0 nm
Approach
(Non-precision)
LNAV
1.0 nm decreasing to 350 feet depending on variables (see Figure 2-31)
Approach
(Non-precision with Vertical Guidance)
LNAV + V
Approach
(LNAV/VNAV)
L/VNAV
1.0 nm decreasing to a specified course width, then 0.3 nm, depending on variables (see Figure 2-32)
Approach
(LPV)
LPV
Missed Approach
MAPR
0.3 nm
* Flight phase annunciations are normally shown in magenta, but when cautionary conditions exist the color changes to yellow.
Table 2-2 Automatic GPS CDI Scaling
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 69
Flight Instruments
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
OBS Mode NOTE: VNV is inhibited while automatic waypoint sequencing has been suspended.
Enabling Omni-bearing Selector (OBS) Mode suspends the automatic sequencing of waypoints in a GPS flight plan (GPS must be the selected navigation source), but retains the current Active-to waypoint as the navigation reference even after passing the waypoint. OBS is annunciated to the lower right of the aircraft symbol when OBS Mode is selected.
While OBS Mode is enabled, a course line is drawn through the Active-to waypoint on the moving map. If desired, the course to/from the waypoint can now be adjusted. When OBS Mode is disabled, the GPS flight plan returns to normal operation with automatic sequencing of waypoints, following the course set in OBS Mode. The flight path on the moving map retains the modified course line.
Extended Course LineOBS CourseFigure 2-33 Omni-bearing Selector (OBS) ModePressing the OBS Softkey Again, Returns to Normal OperationGPS SelectedOBS Mode EnabledPressing the OBS Softkey Suspends Waypoint Sequencing
70 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Flight Instruments
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Enabling/disabling OBS Mode while navigating a GPS flight plan:
1) Press the OBS Softkey to select OBS Mode.
2) Turn a CRS Knob to select the desired course to/from the waypoint. Press a CRS Knob to synchronize the Selected Course with the bearing to the next waypoint.
　
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