2-1
2. INSTALLATION OF TRANSDUC-
ERS
2.1 How to Mount a Transducer through the Unit
Transducer mounting location
The thru-hull mount transducer provides the best performance of all, since the trans-
ducer protrudes from the hull and the effect of air bubbles and turbulence near the hull
skin is reduced. When the boat has a keel, the transducer should be at least 30 cm
away from it.
The performance of this fish finder is directly re-
lated to the mounting location of the transduc-
er, especially for high-speed cruising. The
installation should be planned in advance,
keeping the length of the transducer cable and
the following factors in mind:
• Air bubbles and turbulence caused by move-
ment of the boat seriously degrade the
sounding capability of the transducer. The
transducer should, therefore, be located in a
position where water flow is the smoothest.
Noise from the propellers also adversely af-
fects 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 location is generally rather far astern,
so that the transducer is always in water regardless of the planing attitude.
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