IFD500 Series Pilot Guide
Navigation 6-7
VLOC is active (green), and all external
deviation data being transmitted by the IFD is in
reference to the tuned VHF navaid (e.g.
Inbound VOR course, localizer deviation, etc).
Note that if no VHF data is being received (e.g.
out of range, improperly tuned nav radio, etc.),
the nav mode will be displayed in yellow. It will
also stay yellow until the nav channel is fully
decoded as an indication to manually tune-
identify-monitor.
OBS is active (green) and deviation data being
transmitted by the IFD is reactive to the external
course setting knob (or the Nav Source knob if
no external course control is present or when a
KI-208A or KI-209A is present) for the
inbound/outbound course.
Note that this state is accessed by pushing in
the Nav Source knob, and then it takes the
place of pure GPS mode as described earlier in
this table.
OBS is active (green) and VLOC is armed
(blue). Deviation data being transmitted by the
IFD is reactive to the external course setting
knob (or the Nav Source knob if no external
course control is present or when a KI-208A or
KI-209A is present) for the inbound/outbound
course.
Note that this state is accessed by pushing in
the Nav Source knob and then it takes the place
of GPS VLOC mode as described earlier in
this table.
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