381298/C
69
Steel conduit
A total of eight transducer cables are used between the transducer and the Transceiver
Unit. In order to ensure a safe installation, a steel conduit must be installed for the
transducer cables.
There are several reasons for this.
• It will make it easier at a later stage to replace the transducer.
• It will protect the cables.
• Noise and interference from other electrical equipment is greatly reduced.
• The risk of flooding is greatly reduced when the steel conduit is terminated above
the water line.
The steel conduit must preferably be straight. Start the conduit immediately above the
transducer, and terminate it well above the water line.
Sealing plate
To allow the transducer cables to penetrate the hull in a safe manner, a sealing plate can
be used. You will not be able to pull the transceiver plug through a sealing plate, which
means that you must order a SN92 or SN93 transducer
without
the transceiver plug, and
with a cable gland kit consisting of washers, a rubber gasket and a packing nut.
The sealing plate can be purchased from Kongsberg Maritime, or you can manufacture
it yourself based on the production drawings available.
•
You can use a sealing plate in combination with a steel conduit, or you can use it by itself.
Note
If you only use a sealing plate to bring the transducer cables through the hull, the
compartment directly over the sealing plate must be watertight. Make sure that your
arrangement is approved by the relevant national registry and corresponding maritime
authority and/or classification society.
Installation drawings
The installation shipyard must provide all necessary design and installation drawings, as
well as the relevant work standards and mounting procedures.
If required, all documents provided by the shipyard for the physical installation of the
SN90 must be approved by the vessel’s national registry and corresponding maritime
authority and/or classification society. Such approval must be obtained before the
installation can begin. The shipowner and shipyard doing the installation are responsible
for obtaining and paying for such approval.
Summary of Contents for Simrad SN90
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