Kongsberg Simrad SN90, Installation Manual

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381298/C
Procedure
1 Based on the vessel drawings, the physical properties of the hull, and the
functionality required by the SN90, design the mounting hardware.
This will normally be an installation blister or a keel box. Observe the relevant
transducer drawings to design the necessary hole(s) in the plating.
2 Manufacture the hardware according to the relevant production standards.
3 Mount the hardware under the vessel’s hull.
Note
Make sure that the surface of the resulting installation is as smooth and streamlined
as possible. If necessary, grind and polish all surfaces.
Mounting screws or bolts must not be extruding from the hull or from the installation
hardware, blister or keel box Obstructions on these surfaces will create problems
with turbulant flow, and may noise.
4 If relevant, allow the relevant maritime authority and/or classification society to
inspect and approve the design and installation.
Related topics
Installation summary, page 65
372915 Clamping frame, page 234
373514 Mounting house, page 237
Designing, manufacturing and mounting the 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.
Prerequisites
In order to do this task, the following prerequisites must be met.
• All relevant vessel and transducer drawings must be available.
• All relevant work instructions, procedures and standards must be available.
• All relevant drawings have been approved by the classification society.
• The physical location of the transducer has been determined.
• The installation method has been determined.
• The installation angles of the transducer have been defined.
• All relevant personnel (naval architects, designers, skilled shipyard workers) and
tools must be available.
Simrad SN90