Raymarine ST5000+, Owner'S Handbook Manual

Page: 57 / 108

Chapter 5: Installation
45
0.3L to 0.5L
L
X
Y
D269-2
• To avoid deviation of both compasses, the fluxgate compass should
be installed at least 0.8 m (2.5 ft) away from the steering compass.
• The fluxgate compass must be positioned as far away as possible
from large iron masses, such as the engine and other magnetic
devices, which may cause deviation and reduce the sensitivity of
the sensor.
• If you have any doubts about the magnetic suitability of the chosen
site, the position may be surveyed using a simple hand bearing
compass. The hand bearing compass should be fixed in the chosen
position and the vessel swung through 360°.
• Differences between the hand bearing compass and the main
steering compass should, ideally, not exceed 20° on any heading.
Mounting location for steel-hulled vessels
If you have a steel-hulled vessel and mount the compass in the
conventional location, you will obtain significant deviation due to the
effects of steel on the Earth’s magnetic field.
To minimise this effect, you should raise the compass transducer
above the main deck or wheelhouse. However, the higher above the
waterline you mount the transducer, the more the vessel’s pitch and
roll will affect the compass performance. Recommended mounting
positions are shown in the following diagram.
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