Smooth Surface Is Important; Example: Box Keel Installation; Transducer Flush Mounted In A Steel Tank; Use Mounting And Clamping Rings Whenever Provided - Simrad 38-200 COMBI W - INSTALLATION REV D Installation Manual

Figure 6 Box keel installation
Box keel
A
U-shaped
B
support
bar (only
recommended
on large
transducers)
C Stuffing tube
D Cable in steel
conduit
E Cable service
loop

Transducer flush mounted in a steel tank

164986/D

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.

Example: Box keel installation

The figure below illustrates a symmetrical box keel installation.
Flush mounting is used on very large vessels with a hull so deep
that no air bubbles are found below the hull, and on vessels
operating in shallow harbours or waters, where a protruding
blister can not be accepted.
The standard procedure for flush mounting on a steel vessel is
to weld a steel tank inside the hull, and mount the transducer
into this tank.
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
How to install the transducer
15