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If you plan to use the internal magnetic compass as a backup (recommended), consider these guidelines when
selecting the mounting location:
• The compass should not be mounted near known ferrous metal objects such as a toolbox or another
compass.
• A handheld compass should be used to test for magnetic interference in the area where the compass is to
be mounted. Your boat, motors, and devices must be turned on during the test.
If the needle on the handheld compass moves when you hold it where you intend to mount the compass,
magnetic interference is present. You must choose another location and test again.
• Mounting screws are provided with the compass. If you use mounting hardware other than the provided
screws, the hardware must be made of quality stainless steel or brass material to avoid magnetic
interference with the compass.
NOTE: Test all mounting hardware with a handheld compass to make sure no magnetic fields are present in
the hardware.
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