Garmin G2000 Cockpit Reference Guide for the Cessna Corvalis T240
190-01264-01 Rev. A
109
Abnormal Operation
Flight
Instruments
EIS
Nav/Com/
XPDR/Audio
AFCS
FMS Nav
Flight
Planning
Pr
ocedur
es
Hazar
d
Avoidance
Additional
Featur
es
Abnormal
Oper
ation
Annun/
Alerts
Appendix
Index
Extreme Pitch Indication
DEAD RECKONING
While in Enroute or Oceanic phase of flight, if the G2000 detects an invalid FMS/
GPS solution or is unable to calculate a FMS/GPS position, the system automatically
reverts to Dead Reckoning (DR) Mode. In DR Mode, the G2000 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.
NOTE:
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 G2000 stops
navigating in GPS Mode.
DR Mode is indicated on the G2000 by the appearance of the letters ‘DR’ being
prominently displayed, in yellow, on the HSI slightly below and to the left of the
aircraft symbol on the CDI as shown in the following figure. The CDI deviation bar is
displayed in yellow, but will be removed from the display after 20 minutes. Lastly, but
at the same time, a ‘GPS NAV LOST’ alert message appears on the GTC.
Normal navigation using GPS/SBAS source data resumes automatically once a valid
GPS solution is restored.
It is important to note that estimated navigation data supplied by the G2000 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 estimating your 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 G2000 through
DR while there is no heading and/or airspeed data available should not be used for
navigation.
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