OBS MODE
Enabling Omni-bearing Selector (OBS) Mode suspends the automatic
sequencing of waypoints in a GPS ight plan (GPS must be the selected
navigation source), but retains the current Active-to 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 is enabled, a course line is drawn through the Active-to waypoint
on the moving map. If desired, the course to/from the waypoint can now be
adjusted. When OBS Mode is disabled, the GPS ight plan returns to normal
operation, with automatic sequencing of waypoints, following the course set
in OBS Mode. The ight plan on the moving map retains the modied course
line.
Figure 7-21 – Omni-Bearing Selector (OBS) Mode
VERTICAL SPEED INDICATOR
The Vertical Speed Indicator displays the aircraft vertical speed on a xed
scale with labels at 1000 and 2000 fpm and minor tick marks every 500 fpm.
Digits appear in the pointer when the climb or descent rate is greater than 100
fpm. If the rate of ascent/descent exceeds 2000 fpm, the pointer appears at
the edge of the tape and the rate appears inside the pointer.
A magenta chevron is displayed on the VSI to indicate the Required Vertical
Speed for reaching a VNV target altitude once the “TOD [Top of Descent]
within 1 minute” alert has generated.
NOTE: VNV is inhibited while automatic waypoint sequencing has been
suspended.
Pressing the
OB
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