Obs Mode - BENDIXKing AeroNav 910 Pilot's Manual

OBS MODE

"PUSH OBS" is the label underneath the knob (or the button label
in the case of AeroNav 880) and is active when you can put the
system in To/From course setting mode for a waypoint. There is
no need for "suspend" functionality in the AeroNav paradigm –
the AeroNav will continue sequencing to the next waypoint and
exit OBS mode at that time.
NOTE
GPS and OBS
If GPS or OBS are not the active Nav state
(annunciated in green), then pushing the Nav
Source knob will have no effect. When one of them
is the active Nav state, pushing the Nav Source
knob will toggle between the two states.
NOTE
OBS Can Not Be Activated Inside the FAF
OBS is prevented from being selected on a
published approach when inside the Final Approach
Fix (FAF).
The depiction on the map when in OBS mode depends on
whether the system determines if the airplane is in TO or FROM
orientation.
In OBS TO (defined as when the difference between the selected
OBS course and the aircraft course to the fix is less than 90°), the
map will display only the magenta leg to be flown to the fix.
There is no white leg depiction for the outbound leg because the
89000039-010
Rev 1 May 2019
AeroNav 900/880 Series Pilot's Guide
Navigation 6-9