Simrad ES120-7C - REV D, Installation Manual, Page: 60 / 98

58
330254/B
Note
Make sure that the Forward direction on transducer points in the forward direction of
the vessel.
Suitable mounting and clamping rings can be provided by Kongsberg Maritime. The
drawings are available for local manufacturing. The drawing (normally in AutoCad format)
can be downloaded from our website.
• https://www.simrad.com
Smooth surface is important
Make sure that the surface of the transducer face, as well as the plating and putty around
the transducer is as even and smooth as possible. Obstructions on these surfaces will create
problems with turbulent flow, and may cause noise.
Mounting screws or bolts must not be extruding from the transducer or the plating
immediately around it.
Note
Obstructions on these surfaces will create problems with turbulent flow, and may cause noise.
Related topics
Using a steel conduit to protect the transducer cable, page 65
Smooth surface is important, page 68
Using a suitable inclination angle, page 68
Transducer installation using drop keel
If your vessel is fitted with a drop keel, this is a superior platform for the ES120-7C
transducer.
Drop keels are often used on larger research vessels. A drop keel will frequently protrude as
far as three meters below the hull. At that depth, the water is free of air bubbles up, even
during very high sea states. The vessel is then able to do reliable acoustic measurements in
open sea a larger part of the year.
At the bottom of the drop keel, the ES120-7C can be installed with the transducer face
flushed with the horizontal plating. A protective tank may not be necessary, since the drop
keel will normally offer adequate protection.
The drop keel is normally used for several echo sounder transducers.
Simrad ES120-7C Installation Manual