Filter
Top Products
1-8
Installing the thru-hull mount transducer
Transducer mounting location
This type of mounting provides the best performance of all, since the
transducer protrudes from the hull and the effect of air bubbles and
turbulence neat the hull skin is reduced. When the boat has a keel, the
transducer should be at least 30 cm away from it. Typical through
hull mountings are shown in the figure on the next page.
The performance of the video sounder is directly related to the mount-
ing location of the transducer, especially for high-speed cruising. The
installation should be planned in advance, keeping the standard cable
length (8 m) and the following factors in mind:
• Air bubbles and turbulence caused by movement of the boat seri-
ously degrade the sounding capability of the transducer. The trans-
ducer should, therefore, be located in a position where water flow
is the smoothest. Noise from the propellers also adversely affects
performance and the transducer should not be mounted nearby.
The lifting strakes are notorious for creating acoustic noise, and
these must be avoided by keeping the transducer inboard of them.
• The transducer must always remain submerged, even when the
boat is rolling, pitching or up on a plane at high speed.
• A practical choice would be somewhere between 1/3 and 1/2 of
the boat's length from the stern. For planing hulls, a practical loca-
tion is generally rather far astern, so that the transducer is always
in water regardless of the planing attitude.
Transducer outline drawings
22
120
30
68 87
68
120
28
24
520-5PSD (option) 520-5MSD (option)
Ship's
bow
All dimensions
in millimeters
Figure 1-11 Transducer outline drawings