Prerequisites
The vessel is in dry dock. The SU90 system is turned off. The following tools and consumables are required:
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A mild synthetic detergent and a plastic brush |
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Fine-grade sandpaper (240 inch grit size) |
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Anti-fouling paintNoteBecause some paint types may be aggressive to the polyurethane in the transducer, consult our list of approved paints.
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Two persons are needed to do the task.
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One person must stay in the sonar room to operate the hull unit. |
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One person must stay in the dry dock, under the hull, to make sure that the transducer is not lowered too far down. |
Proper oral communication must exist between the sonar room and the dry dock personnel.
Context
The transducer has not been designed with any protection against biological fouling. Anti-fouling paint may therefore be applied to the transducer face. To minimize the negative acoustical effects the layer of anti-fouling paint must be as thin as possible.
NoteThe anti-fouling paint will reduce the acoustical performance of the transducer. The surface roughness of the transducer substrate and the thickness of the paint may also influence the performance. Kongsberg Maritime cannot be held responsible for any negative consequences of the anti-fouling paint.
Observe the relevant instructions and safety information provided by the paint manufacturer.
Further requirements
The contractor or shipyard must keep a daily paint log recording all relevant information from the surface treatment.