Garmin G500 Pilot's Manual page 80

Land Data
The Land Data option selects whether detailed land features, such as rivers,
roads, cities, are displayed. Topo features, traffic, terrain, and obstacles will still
be displayed, even with Land Data turned off.
Track Vector Length
When turned on, the Track Vector Length option will show a dashed line
and arrow extending from the aircraft icon illustrating the current Track and the
distance the aircraft will travel in the selected time.
Aircraft Present Position
3-16
Figure 3-20 Navigation Map Land Data
Figure 3-21 Navigation Map Track Vector
Garmin G500 Pilot's Guide
Track Vector
190-01102-02 Rev. B