Raymarine Heading Sensor - Manual (Page 13)

7 Chapter 3: Installation
D3548-2
Connections to Other Equipment
If your Raymarine equipment is to be connected to other equipment
using a cable not supplied by Raymarine, a suppression ferrite MUST
always be attached to the cable near the Raymarine unit.
3.2 Siting the Heading Sensor
The Heading Sensor must be fitted to a vertical or horizontal bulkhead
(preferably forward facing), away from large ferrous objects such as the
engine and other magnetic devices.
If you have any doubts about the magnetic suitability of a chosen
location, attach a hand bearing compass to the chosen site and then turn
your vessel through 360°. Differences between the hand-bearing
compass and the boat’s compass should not exceed 10° on any heading.
The Heading Sensor should be positioned as close as possible to the
pitch and roll centre of the vessel, as shown in the following diagram.
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