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Flight Management anagement SYSTEM OVERVIEW FLIGHT AUDIO PANEL EICAS INSTRUMENTS & CNS FLIGHT MANAGEMENT HAZARD ADDITIONAL AFCS AVOIDANCE INDEX APPENDICES FEATURES 5.12 Abnormal Operationperation This section discusses the Dead Reckoning mode of operation and the subsequent indications. Noteote: Dead Reckoning Mode only functions in Enroute (ENR) or Oceanic (OCN) phase of flight. In all other phases, an invalid GPS solution produces a “NO GPS POSITION” annunciation on the map and the G1000 stops using GPS. While in Enroute or Oceanic phase of flight, if the G1000 detects an invalid GPS solution or is unable to calculate a GPS position, the system automatically reverts to Dead Reckoning (DR) Mode. In DR Mode, the G1000 uses its last-known position combined with continuously updated airspeed and heading data (when available) to calculate and display the aircraft’s current estimated position. It is important to note that estimated navigation data supplied by the G1000 in DR Mode may become increasingly unreliable and must not be used as a sole means of navigation. If while in DR Mode airspeed and/or heading data is also lost or not available, the DR function may not be capable of accurately tracking estimated position and, consequently, the system may display a path that is different than the actual movement of the aircraft. Estimated position information displayed by the G1000 through DR while there is no heading and/or airspeed data available should not be used for navigation. DR Mode is inherently less accurate than the standard GPS/WAAS Mode due to the lack of satellite measurements needed to determine a position. Changes in wind speed and/or wind direction compound the relative inaccuracy of DR Mode. Because of this degraded accuracy, other navigation equipment must be relied upon for position awareness until GPS-derived position data is restored. DR Mode is indicated on the G1000 by the appearance of the letters ‘DR’ superimposed in yellow over the ‘own aircraft’ symbol as shown in Figure 5-143. In addition, ‘DR’ is prominently displayed in yellow on the HSI slightly above and to the right of the aircraft symbol on the CDI as shown in Figure 5-143. Also, the CDI deviation bar is removed from the display. Lastly, but at the same time, a ‘GPS NAV LOST’ alert message appears on the PFD. Normal navigation using GPS/WAAS source data resumes automatically once a valid GPS solution is restored. As a result of operating in DR Mode, all GPS-derived data is computed based upon an estimated position and is displayed as yellow text on the display to denote degraded navigation source information as shown in Figure 5-143. Also, while the G1000 is in DR Mode, the autopilot does not couple to GPS, and both TAWS and Terrain Proximity are disabled. Additionally, the accuracy of all nearest information (airports, airspaces, and waypoints) is questionable. Finally, airspace alerts continue to function, but with degraded accuracy. 190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 281 Flight Management anagement SYSTEM OVERVIEW FLIGHT INSTRUMENTS EICAS AUDIO PANEL & CNS FLIGHT MANAGEMENT HAZARD AVOIDANCE AFCS ADDITIONAL FEATURES APPENDICES INDEX Figure 5-143 Dead Reckoning Mode - GPS Derived Data Shown in YellowDistance &BearingGPS Navigation Lost MessageDead Reckoning AnnunciationSubdued Aircraft SymbolNavigation Data BarAll data except Active Leg, TAS, and DTK are in yellowDead Reckoning AnnunciaionWind DataWind DataBearing Pointer/DistanceTrack Bug(if shown) Noteote: The Inset Map is removed from the PFD any time aircraft pitch is greater than +30° or less than –20°, or when a 65° bank angle is reached. 282 Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 190-00494-02 Rev. B Flight Management anagement SYSTEM OVERVIEW FLIGHT AUDIO PANEL EICAS INSTRUMENTS & CNS FLIGHT MANAGEMENT HAZARD ADDITIONAL AFCS AVOIDANCE INDEX APPENDICES FEATURES Blank Page 190-00494-02 Rev. B Garmin G1000 Pilot’s Guide for the Cessna Citation Mustang 283 Hazard Avoidancevoidancevoidance SYSTEM OVERVIEW FLIGHT INSTRUMENTS EICAS AUDIO PANEL & CNS FLIGHT MANAGEMENT HAZARD AVOIDANCE AFCS ADDITIONAL FEATURES APPENDICES INDEX Section 6 Hazard Avoidancevoidancevoidance The G1000 hazard avoidance features are designed to provide advisory information of potential hazards to flight safety associated with weather, terrain, and air traffic. This section is divided into the following groups: Weather • GDL 69/69A XM® Satellite Weather (Optional) www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：Cessna Citation Mustang Pilot’Guide 2
