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2) Press the ENT Key.
Figure 6-51 Selecting Sector Scan Position
3) Turn the small FMS Knob to place the Bearing Line in the desired position. The location of the Bearing Line becomes the center point of the Sector Scan.
4) Turn the large FMS Knob to place the cursor in the SECTOR SCAN field.
5) Turn the small FMS Knob to select FULL, 60˚, 40˚, or 20˚ scan.
6) If desired, readjust the Bearing Line as discussed previously to change the center of the Sector Scan.
7) Select the BRG Softkey again to remove the Bearing Line and cursor. The bearing reference is also reset to 0º.
328 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Hazard Avoidance voidance voidance
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Figure 6-52 40˚ Sector Scan
A
ntenna Stabilization
1) To activate or deactivate the antenna stabilization, select the MODE Softkey.
2) Select the STAB ON Softkey to activate antenna stabilization or select the STAB OFF Softkey to deactivate. The current stabilization condition is shown in the upper right of the weather radar display.
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 329
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SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
Weather Attenuated Color Highlight (WATCHATCH®)
WATCH® identifies deceptively strong or unknown intensity parts of a storm. While in horizontal scan mode, this feature can be used as a tool to determine areas of possible inaccuracies in displayed intensity due to weakening of the radar energy. This weakening is known as attenuation. The radar energy weakens as it passes through areas of intense precipitation, large areas of lesser precipitation, and distance. Issues with the radome also attenuates the radar energy. All these factors have an effect on the return intensity. The more energy that dissipates, the lesser the displayed intensity of the return. Accuracy of the displayed intensity of returns located in the shaded areas are suspect. Make maneuvering decisions with this information in mind. Proper antenna tilt management should still be employed to determine the extent of attenuation in a shaded area.
To activate or deactivate the WATCH® feature, select the WATCH Softkey.
Horizontal Scan With WATCH®Horizontal Scan Without WATCH®Areas of Attenuated SignalDisplayed intensity is questionable. Potentially stronger than displayed.Figure 6-53 Horizontal Scan Without and With WATCH®
330 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B
Hazard Avoidance voidance voidance
SYSTEM
OVERVIEW
FLIGHT
AUDIO PANEL EICAS INSTRUMENTS
& CNS
FLIGHT
MANAGEMENT
HAZARD
ADDITIONAL AFCS AVOIDANCE
INDEX APPENDICES FEATURES
Weather Alert
The Weather Alert feature indicates the presence of heavy precipitation between the ranges of 80 and 320 nm regardless of the currently displayed range. Weather Alert targets appear as red bands along the outer range ring at the approximate azimuth of the detected returns.
If a Weather Alert is detected within ±10° of the aircraft heading, an alert is displayed on the PFD in the Messages Window.
If the antenna tilt is adjusted too low, a weather alert can be generated by ground returns. To avoid unwanted weather alerts, deselect the WX ALRT Softkey..
Figure 6-54 Weather Alert IndicationsWeather Alerts
To activate or deactivate Weather Alerts, select the WX ALRT Softkey. Activating and deactivating also enables or inhibits the alert on the PFD.
Figure 6-55 Weather Alert on PFD
190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 331
Hazard Avoidance voidance voidance
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EICAS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
Ground Mapping and Interpretationnterpretationnterpretation
A secondary use of the weather radar system is for the presentation of terrain. This can be a useful tool for verifying aircraft position. A picture of the ground is represented much like a topographical map that can be used as a supplement to the navigation map on the MFD.
Ground Map mode uses a different gain range than Weather mode. Different colors are also used to represent the intensity levels. The displayed intensity of ground target returns are defined in the table below. Use of the GAIN and TILT controls helps improve contrast so that specific ground targets can be recognized more easily. As previously discussed, the type and orientation of the target in relation to the aircraft affects the intensity displayed.
　
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