Garmin NavTalk Pilot Pilot's Manual & Reference page 83

Heading Bug
Course Pointer
TO/FROM
Indicator
At the center of the CDI is a course deviation bar
(D-bar). As you move off course, the D-bar indicates how
far off course you are and in what direction. The scale for
the CDI is indicated at the bottom of the page. The scale
represents the distance from the center of the CDI to full
left or right limits.
As you approach the waypoint, a TO/FROM indicator
will signal waypoint crossing. The current speed, distance
to the next waypoint, time to the next waypoint and
vertical speed to target are all displayed above the graphic
HSI. To see how all this works on the simulated trip, head
off course and watch the displays change.
Use the left/right arrow keys to move off course/on
course in simulator mode.
Section 5
Basic GPS
Using the
Simulator
Compass Card
(Track)
D-bar and CDI Scale
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