Installation of the ADU
2-24
2.3.3 To ground the ADU
The ADU must be grounded using the mounting bolts. If the ADU cannot or should not be
electrically connected directly to the mounting surface, you can use a separate grounding
cable to make the connection between the ADU and the common ground to which the
ACU is also connected. If grounding to the ship ground is impossible, for example if you
have a fibre glass hull, see.Alternative grounding for fibre glass hulls on page F-6.
To obtain a good ground connection, the metal underneath the head of at least one bolt
must be clean of insulating protective coating and a serrated washer should be used. After
tightening the bolts we recommend that you seal the area suitably in order to avoid
corrosion of the grounding point. Use stainless steel bolts and washers.
Optimum grounding is achieved by connecting the ground wire to the bolt marked in the
figure below.
For further information on grounding and RF protection see Grounding and RF protection
on page F-1.
Figure 2-21: FV-110: ADU, bolt for optimum grounding
Bolt used
for best grounding
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General