Transducer Installation In Box Keel - Simrad ES70 - INSTALLATION REV A Installation Manual

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.
A Keel
Transducer
B
blister
C Horizontal
distance
between keel
and blister
D Vertical
distance
between the
blister surface
and the keel

Transducer installation in box keel

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 mounting and clamping rings whenever provided
Circular transducers may be provided with mounting and clamping rings, or with
drawings to allow for local production of these. The mounting ring is welded to the
hole prepared for the transducer, while the clamping ring fits around the edge of the
transducer body. Bolts through the clamping ring into the mounting ring will secure the
transducer between them. 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 mount it, the hull plating and the putty around the transducer is as
even and smooth as possible. Obstructions on these surfaces will create problems with
turbulent flow.
343522/A
Transducer Installation
127