Kongsberg Simrad SN90, Installation Manual

Page: 85 / 298

381298/C
83
The installation shipyard must provide all necessary installation drawings.
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.
Related topics
Installing the transducer cables in "wet" conduit, page 83
Installing the transducer cables in a "dry" conduit, page 85
Installing the transducer cables using a sealing plate, page 87
Installing the transducer cables in "wet" conduit
A steel conduit is welded to the hull plating immediately over the transducer. The
conduit must maintain the watertight integrity of the hull. The steel conduit is terminated
above the freeboard deck, and the opening is secured with multi-diameter cable sealing.
This "wet conduit" installation principle allows you to use an SN90 or SN91 transducer
with the transceiver connector readily mounted to the cable.
(CD010205_100_005)
A
Transceiver Unit
B
Multi-diameter cable sealing,
installed after the cables have
been pulled up through the steel
conduit.
C
Steel conduit
D Freeboard deck
Steel conduit
The steel conduit must preferably
be straight. Start the conduit
immediately above the transducer,
and terminate it well above the water
line.
Secure the steel conduit to decks
and/or bulkheads with welds.
Installing the transducer