Kongsberg Simrad ES80, Руководство по установке, Страница: 51 / 312

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It is our experience that a wide and flat bottom, with a rising angle less than around 13
degrees, is prone to giving air problems for the transducer. In any case a transducer location
in the forward part of the hull is preferred in order to minimise the influence of the boundary
layer.
Related topics
Where to install the transducer, page 46
Preparations, page 41
Keep the transducer far away from the propellers
The propulsion propellers is the dominant noise source on most vessels. The noise is
easily transmitted through the water. This noise may often reduce the overall performance
of your ES80.
The transducer must be installed as far away from the propellers as possible. The best
positions are therefore on the fore part of the hull. Positions outside the direct line of sight
from the propellers are best.
On small vessels we recommend mounting the transducer on that side of the keel where
the propeller blades move
upwards . This is because the propeller cavitation is weakest on
that side. The cavitation starts when the water flows in the same direction as the propeller
blades. This is where the propeller blades move downwards.
Related topics
Where to install the transducer, page 46
Preparations, page 41
Mount the transducer at a safe distance from bow thruster(s)
Bow thruster propellers are extremely noisy. When you decide where to place the transducer,
you must consider the noise created by most bow thrusters.
When in operation, the noise and cavitation bubbles created by the thruster may make your
ES80 Wideband fish finding echo sounder useless, almost no matter where the transducer is
installed. When the bow thrusters are
not in operation, the tunnel creates turbulence. If your
vessel is pitching, the tunnel may be filled with air or aerated water in the upper position and
release this in the lower position.
In general, the transducer should therefore be placed well away from the bow thruster(s).
However, this is not an invariable rule. Certain thruster designs - combined with their
physical locations on the hull - may still offer a suitable location for the transducer, even
close to the thruster. If you are in doubt, consult a naval architect.
Preparations