FMS GENERAL DESCRIPTION
14 FMGS OPERATION
Lateral guidance
Managed mode: NAV
NAV mode is engaged by pushing the HDG/TRK Selector knob.
Lateral guidance is controlled by the FMGC to follow the trajectory
defined in FMS.
− On PFD the FMA displays NAV,
− On FCU the Heading/Track Window is dashed and the Managed
Lateral Dot is displayed,
− On PFD/ND actual heading and actual track are displayed, but
selected Heading or Track Index (blue) is
not displayed,
− On ND the flight plan track is displayed by a continuous green line,
− MCDU is used to change the flight path.
Selected mode: HDG (or TRK)
HDG (or TRK) mode is engaged by pulling the HDG/TRK Selector
knob.
Lateral guidance is controlled by pilot selection on the FCU.
− On PFD the FMA displays HDG (or TRK),
− On PFD/ND the selected Heading or Track Index (blue) is displayed,
− On ND flight plan track is displayed by a dashed green line, and
actual track by a continuous green line,
− On FCU the Heading/Track Window displays the Target Heading
(Track).
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
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