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1. MOUNTING
1.2.1
How to mount a transducer through the hull
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. If your boat has a keel, the transducer should be at least 30 cm away
from it.
The performance of this fish finder is directly related to the mounting location of the
transducer, 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 movement of
the boat seriously degrade
the sounding capability of
the transducer. The trans-
ducer should, therefore, be
located in a position where
water flow is the smooth-
est. Noise from the propel-
lers also adversely affects
performance and the trans-
ducer should not be mount-
ed 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 your 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.
1-8
Position 1/2 to 1/3 of the hull from stern.
●
15 to 30 cm off center line (inside first lifting strakes.)
●
Within the wetted bottom area
●
Deadrise angle within 15°
●
DEEP V
HULL
HIGH SPEED
V HULL
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