Installation manual

Introduction

851--160115 / B

3 GENERAL REQUIREMENTS

3.1 Responsibility and approbation

The Hull Unit of the sonar is generally approved by The

Norwegian Veritas (Organization for classification and registry of

shipping). An approval of the installation must, however, be

applied for in each case to the local maritime authority.

The ship owner and the shipyard are responsible for the

application.

3.2 Compass deviation

When the installation is finished, the compass must be checked

both with the sonar operative and inoperative. The ship owner

and the skipper are responsible for such a check to be carried out.

3.3 Noise sources

Prior to installation, the vessel’s hull should be thoroughly

inspected in dock. Roughness on the s hell plating surface, and

protruding obstacles are examples of noise-causing elements.

These must be smoothed or removed. Also ensure that the

propeller is not chipped or corroded.

3.4 Docking

When dry docking the vessel, make sure that there is enough

room underneath for installation of the sonar trunk and

protection blister (refer to figures 4 and 5 in section Installation

procedures .

3.5 Cabling

If the cable from the wheelhouse to the sonar room passes through

hatches or places where it may be damaged, it should be run

through a pipe. Note that the cable must not be installed together

with high-power cables, antenna cables etc.