Simrad 38/200 Combi W
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
B
Transducer
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.
14
164986/D