Garmin Software Version 0764.14 Uživatelská příručka Strana 126

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 184
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 125
Cirrus Perspective
by Garmin – Cockpit Reference Guide for the SR20/SR22/SR22T
190-00821-08 Rev. A
110
Abnormal Operation
Flight
InstrumentsEIS
Nav/Com/
XPDR/AudioAFCSGPS Nav
Flight
PlanningProcedures
Hazard
Avoidance
Additional
Features
Abnormal
Operation
Annun/
AlertsAppendixIndex
DEAD RECKONING
While in Enroute or Oceanic phase of flight, if the Perspective
system 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system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 system stops
navigating in GPS Mode.
DRModeisindicatedbytheappearanceoftheletters‘DR’superimposedinyellow
over the ‘own aircraft’symbol as shown in the following gure. In addition, ‘DR’
is prominently displayed, also in yellow, on the HSI slightly above and to the right
of the aircraft symbol on the CDI as shown in the following figure. Also, the CDI
deviation bar is displayed in yellow. Lastly, but at the same time, a ‘GPS NAV LOST’
alert message appears on the PFD.
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 system 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 system 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/SBAS Mode due to the
lack of satellite measurements needed to determine a position. Changes in wind speed
and/or wind direction compounds the relative inaccuracy of DRMode.Becauseofthis
degraded accuracy, the crew must maintain position awareness using other navigation
equipment until GPS-derived position data is restored.
Zobrazit stránku 125
1 2 ... 121 122 123 124 125 126 127 128 129 130 131 ... 183 184

Komentáře k této Příručce

Žádné komentáře