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J7886 D180 v1.1
Page 15 of 20
5.3.2 (HDG, TRK or NAV) OFF/ON
This button toggles the roll servo ON and
OFF in the specified mode.
NOTE
:
When the AP is engaged in HDG or TRK
mode, the heading bug is synchronized to
the current heading or ground track,
respectively. The heading or track bug is
then adjusted while the AP is engaged.
5.3.3 ALT OFF/ON
This button toggles the pitch servo ON
and OFF.
NOTE
:
When the AP is engaged in ALT mode,
the ALT bug is synchronized to the
current altitude. The altitude bug is then
adjusted while the AP is engaged.
5.3.4 180
This button sets a TRK bug 180° from the
current ground track.
The AP enagages both servos to hold
altitude in a left turn until the aircraft is
flying in the opposite direction. While in
the 180 mode, the 180 button is
highlightes and the AP status indicator
displays 180 in the roll axis position.
Once the turn manouvre has been
completed, the AP remains in TRK and
ALT hold modes.