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There are three methods for installing the
transducer on the ship (thru-hull mount, in-
side the hull and transom mount) and one of
those methods is to be selected according to
the structure of the ship. The procedure
which follows below shows how to install a
small transducer (520-5PSD/5MSD) as the
representative example of installation.
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 transducer 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.
ø22
120
30
68
520-5PSD
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°
●
1. MOUNTING
ø24
120
28
Unit: mm
68
BOW
87
520-5MSD
DEEP V
HULL
HIGH SPEED
V HULL
1-7
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