The installation trunk must be mounted so that it remains vertical during normal operating conditions. The fairing around the installation trunk must be streamlined. The transducer must be protruding far enough down to reach out of the boundary layer.
The primary sources of underwater disturbance (other than a vessel’s main propeller and bow/stern thruster) that have a negative
effect on the performance are:
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Cooling elements protruding from the hull |
ImportantAll appendages to the hull, indentations, physical damage and pipes are potential sources of underwater noise. These may act as resonant cavities amplifying noise at certain frequencies, create cavitation or turbulence. The installation trunk and hull unit must not be located in the vicinity of such objects, and especially not immediately aft
of them.