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Simrad ES38B
Keel
A
B
Transducer
blister
Horizontal
C
distance
between keel
and blister
D
Vertical
distance
between the
blister surface
and the keel
Transducer installation in box keel
14
Observe the horizontal and vertical distances (C and D) between
the keel and the transducer blister. On a medium sized vessel, the
horizontal distance (C) should be approximately 1 meter. The
vertical distance (D) must in general be as small as possible. This
is important to prevent the keel from shadowing the transducer
beam in shallow waters.
Vessels with a box keel may use this for transducer installation.
The box keel is already the deepest part of the vessel. If the
box keel is too narrow to accommodate the transducer, it can be
widened, either symmetrically or to one side only. In the last
case the installation could also be described as a blister merged
into the keel.
Use the mounting ring
Large circular transducers are designed to be mounted using
a mounting ring. A suitable mounting can be provided by
Simrad, drawings are also available for local production. The
mounting ring is welded to the hole prepared for the transducer.
Bolts through the transducer body into the mounting ring will
secure the transducer in place. Note that several transducers use
direction guides to allow correct mounting.
Smooth surface is important
Mounting screws or bolts must not be extruding from the
transducer or the area immediately around it. Make sure that the
surface of the transducer face, the installation hardware used to
338462/B
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