Simrad 398445, Руководство по установке, Страница: 51 / 66

404776/A
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A
Keel
B Transducer blister
C
Horizontal distance between the
keel and the blister
D Vertical distance between the
bottom of the keel and the blister
surface
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.
Smooth surface is important
Ensure that the surface of the transducer face, the hull plating and putty around the
transducer is as even and smooth as possible. Obstructions on these surfaces will create
problems with turbulent flow.
Mounting screws or bolts must not be extruding from the transducer or the area immediately
around it.
Note
Obstructions on these surfaces will create problems with turbulent flow.
Use a suitable toe-in angle
The primary consideration for any transducer installation must be to allow laminar water
flow. In most cases this is achieved by designing the blister in parallel with the keel.
However, if the blister is located close to the bow, the front of the blister should have a few
degrees "toe-in" towards the bow.
Transducer installation principles