Garmin G1000 NXi Pilot’s Guide for the Cessna NAV III
190-02177-02 Rev. A
62
FLIGHT INSTRUMENTS
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FLIGHT
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ANEL
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GEMENT
HAZARD
AV
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ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
OBS MODE
NOTE:
VNV is inhibited while automatic waypoint sequencing has been suspended.
Enabling Omni-bearing Selector (OBS) Mode suspends the automatic sequencing of waypoints in a GPS
flight plan (GPS must be the selected navigation source), but retains the current active waypoint as the
navigation reference even after passing the waypoint. OBS is annunciated to the lower right of the aircraft
symbol when OBS Mode is selected.
While OBS Mode is enabled, a course line is drawn through the active waypoint on the moving map. If
desired, the course to/from the waypoint can now be adjusted. Magnetic variation correction is applied for
the active waypoint, not current aircraft position; thus, the deviation indicator may move when enabling/
disabling OBS Mode.
When OBS Mode is disabled, the GPS flight plan returns to normal operation, with automatic sequencing
of waypoints, following the course set in OBS Mode. The flight plan on the moving map retains the modified
course line.
Figure 2-29 Omni-bearing Selector (OBS) Mode
GPS
Selected
Pressing the
OBS
Softkey Enables OBS
Mode
OBS Mode
Enabled
Extended
Course
Line
Pressing the
OBS
Softkey Again
Disables OBS Mode
Enabling/disabling OBS Mode while navigating a GPS flight plan:
1)
Press the
OBS
Softkey to select OBS Mode.
2)
Turn the
CRS
Knob to select the desired course to/from the waypoint. Push the
CRS
Knob to synchronize the
Selected Course with the bearing to the next waypoint.
3)
Press the
OBS
Softkey again to return to automatic waypoint sequencing.
As the aircraft crosses the missed approach point (MAP), automatic approach waypoint sequencing is
suspended. SUSP appears on the HSI to the lower right of the aircraft symbol. The
OBS
Softkey becomes
the
SUSP
Softkey with its annunciator green to indicate the suspension is active as shown in the following
figure. Pressing the
SUSP
Softkey deactivates the suspension and resumes automatic sequencing of approach
waypoints, and the
SUSP
Softkey becomes the
OBS
Softkey.