Box Keel - Simrad TRANSDUCER - INSTALLATION GENERIC REV H Installation Manual

Simrad Echo sounder transducers

Box keel

22
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.
Mounting and clamping rings
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 in the box keel,
while the clamping ring fits around the edge of the transducer
body. Bolts through the clamping ring into the mounting ring
will then secure the transducer between them. Note that several
transducers use direction guides to allow correct mounting.
Smooth surface
Mounting screws or bolts must not be extruding from the box
keel. Ensure that the surface of the transducer face, the box,
the hull plating and putty around the transducer is as even and
smooth as possible. Obstructions on these surfaces will create
problems with turbulant flow.
Horizontal support bar
Large diameter transducers must be fitted with a horizontal
support bar. This bar can be secured to the mounting ring using
threaded rods.
851-160164/H