Radio Shack 63-1120 - Manual (Page 6)

6
Note: If you press LIGHT while calibrating your compass (except
after installing/replacing batteries), the compass does not store
the calibration setting and the original setting is unchanged.
USING THE COMPASS
The 8 displayed cardinal points for this compass are N, NE, E, SE,
S, SW, W, and NW.
Distortion Detection
When
DIST
appears, the compass is detecting magnetic
interference that compromises its accuracy. Distortion occurs
when there has been a significant change in the surrounding
magnetic fields, such as when you are driving under an overpass,
or over a bridge. The steel in these structures causes inaccurate
readings in any magnetic compass, but unlike other compasses,
this compass detects interference and alerts you.
If
DIST
appears continuously, recalibrate your compass (see
“Calibrating the Compass” on Page 4).
Turning the Compass On and Off
Press POWER to turn the compass on and off. Or, you can press
LIGHT to turn on the compass and the backlight.
To turn off the compass and the backlight, press POWER .
Important: The compass automatically turns off after about 10
minutes to conserve power if no significant changes occur in the
surrounding magnetic fields.