Garmin GPSMAP 580 Owner's Manual page 47

Measuring Distance
You can measure the distance and bearing between two map items.
To measure the bearing/distance between two points:
1. On the Map page, press Menu to open the options menu.
2. Highlight Measure Distance, and press Enter. An on-screen
arrow appears on the map at your present location with ENT
REF below it.
3. Move the arrow to the reference point (the starting point that
you want to measure from), and press Enter. A push pin icon
marks the starting point.
GPSMAP 580/585 Owner's Manual
4. Move the arrow to the point of which you want to measure.
The bearing and distance from the reference point and arrow
coordinates appear in the data window at the top of the
screen.
Push pin
indicating the
beginning
point of the
measurement
Measure Distance
Operation Mode Pages
End point of
measurement,
labeled ENT
REF
41