28Fish Finder Setup
4. Confi rm the Heading Sensor Operation
It is important to confirm that the Heading Sensor is installed correctly by reviewing
the heading digital readout.
NOTE
This procedure should be performed at slow speeds, in calm, open water, in a large area that
is far from shallow water, boats, or other obstacles.
1. Press the HOME key.
2. Select Settings > User Preferences > Units > Compass > Magnetic North.
3. With a Chart View displayed on-screen, navigate the boat in a straight line,
in calm, open water at 4.5 mph. Compare the Heading digital readout on the
screen with the Course (COG) digital readout. The readouts should be within
approximately 5° of each other.
Adjust: To adjust the zero point of the Heading Sensor, select Settings > NMEA
2000 > Data Offsets. Select Heading Adjustment. Tap the on/off button, or press
the ENTER key, to turn it on. Press and hold the slider, or press and hold the
ENTER key, to adjust the setting.
If the procedure failed: If the Heading digital readout is significantly different
than the COG, the Heading Sensor might be installed in a location with too
much magnetic interference. Check the installation location and possible
magnetic disturbances in the area.
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