Ninglu DS207, Руководство по эксплуатации и установке

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7
Installation
3. Flush
Transducer installation
Single transducer is normally installed in the fore-ship. Larger Vessels are
often fitted with two transducers, one fore and one aft, select with an optional
transducer selector. Optimal system operation is achieved by fitting the
transducer as deep as possible on the hull. The transmitting surface of the
transducer must be installed horizontal. On vessels with a deep keel, if the
transducer must be fitted higher than the keel, it should be fitted towards the
side, as far from the keel as possible to avoid false keel echoes.
Do not mount transducers close to the propeller or aft of other hull
installations (outlets, vents or other protruding details). It is of course necessary
to select a part of the hull that is submerged under all load and speed conditions,
and to avoid positions where air is trapped in heavy weather. If a flat, horizontal
section is not available for transducer fitting, the shipyard must construct a
suitable bed. Do not paint the surface.