Lowrance Handheld Mapping GPS Receiver Operation Instructions Manual page 119

Compass Page menu with Calibrate Compass selected.
A new screen will appear showing a simple drawing of a circle with a line
pointing from the center to a point on the edge. At the top of the screen, the
S C
TART ALIBRATION
The Calibrate Compass page, with Start Calibration selected.
2. Choose a reference point. The reference point is for you alone, the
iFINDER doesn't need to know anything about it. But choose a refer-
ence point nearby such as a tree, your car, or even use your own body.
NOTE:
While calibrating, hold the iFINDER as parallel to the ground as
possible. Tilting the iFINDER makes compass measurements more
difficult for the unit.
3. Now press
slowly around the circle. Turn the iFINDER so that the line is pointing
from the center of the circle directly to your reference point. As the line
continues moving around the circle, rotate the iFINDER to keep the
button is selected.
to start calibration. You'll notice the line moving
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