Prerequisites
The vessel is in dry dock. The ST90 system is turned off. The following tools and consumables are required:
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Mild synthetic detergent |
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Piece of wood or plastic without sharp corners |
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
During normal use, the transducer is subjected to biological fouling. If this marine growth is excessive, it will reduce the overall performance of your system. Whenever opportunity arise, typically when the vessel is dry-docked, the transducer face must be cleaned for shells and other
marine growth. It is important to check the transducer for physical damage. Any cracks, fractures or holes in the red protective coating may result in a water leak, and a leak may cause irreparable
damage to the transducer.
A transducer must always be handled as a delicate instrument. Incorrect actions may damage the transducer beyond repair. A physical blow to the transducer face may easily damage one or more elements. Observe these transducer handling rules:
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Do not activate the transducer when it is out of the water. |
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Do not handle the transducer roughly. Avoid impacts. |
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Do not expose the transducer to direct sunlight or excessive heat. |
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Do not damage the outer protective skin of the transducer. |
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Do not use high-pressure water, sandblasting, metal tools or strong solvents to clean the transducer. |
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Do not step on the transducer cables. |
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Do not damage the transducer cables. Avoid exposure to sharp objects. |