mn100 Digital Display
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4.4 Compass Calibration and Alignment
To ensure that inaccuracies caused by metallic and magnetic objects on
the boat are kept to a minimum is necessary to calibrate the compass.
A deviation caused by surrounding objects will be compensated for and
the compass reading may be set to the correct heading.
Press and hold the button for 2 seconds to enter Setup
Press the button repeatedly to scroll to the SETUP COMPASS
chapter
To Complete a deviation correction turn:
Press the button to advance to the Magnetic Deviation page
Press the button to enter Compass Calibration Mode
Turn the vessel slowly keeping the speed below 4 knots and
taking approximately 2 minutes to complete 360 degrees.
Keep turning the vessel until the display changes to show a
value (usually about 1.25 turns)
If the rate of turn of the vessel is too fast the display will show "TURN
HIGH". It is not necessary to abandon the turn at this stage but do
lessen the rate of turn by reducing speed or widening the turning
circle.Continue to align the heading
Steer the vessel on a known heading.
Only use the main steering compass as a known heading if you are
certain it has been checked and compensated.
Press the button twice to display the Compass Heading page
Press the button to enter Edit Mode
Press the and buttons to change to the known
value. The bottom line of the display will show the offset
entered.
Press the button to exit Edit Mode
Press and hold the button to exit Setup and return to normal
operation.
