Calibrating the Compass
Before you can calibrate the electronic compass, you must be outdoors, away from objects that influence magnetic fields, such as cars, buildings, or overhead power lines.
The device has a 3-axis electronic compass (GPSMAP® 64s/sc/st/sx/csx devices only). You should calibrate the compass after moving long distances, experiencing temperature changes, or changing the batteries.
- From the compass, select MENU.
- Select .
- Follow the on-screen instructions.