Quick Answer
If your compass isn't functioning well, start by checking for damage, checking the declination, and ensuring it's held level and still.
Calibration Check
First, check the compass for any physical damage that could be affecting its accuracy. This includes dents, scratches, or loose parts. If you’ve dropped the compass or exposed it to extreme temperatures, it may need recalibration. Some compasses come with a built-in calibration feature, which can be reset by rotating the bezel to a known north direction, usually marked as a red or orange line.
Declination Adjustment
Next, check the declination of your compass to ensure it matches your current location. Declination is the difference between magnetic north and true north. If your compass is not set to the correct declination, it will not provide accurate readings. Use a declination chart or consult a map to determine the correct declination for your location. Typically, declination is adjusted by turning the declination bezel counterclockwise to increase or clockwise to decrease the declination value.
Holding Techniques
To get an accurate reading from your compass, it’s essential to hold it correctly. Hold the compass level and still, with the direction-of-travel arrow pointing towards your destination. Avoid holding the compass near metal objects, such as your knife or car keys, as this can interfere with the magnetic needle. For best results, hold the compass at eye level and take a moment to stabilize it before reading the direction-of-travel arrow.
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