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1. MOUNTING
1.2
Installation of Transducers
Note: For instructions regarding installation
of network fish finder transducers, see the re-
spective manual.
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 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 transducer
should, therefore, be locat-
ed in a position where water
flow is the smoothest. Noise
from the propellers also ad-
versely affects performance
and the transducer should
not be mounted nearby.
The lifting strakes are noto-
rious for creating acoustic
noise, and these must be
avoided by keeping the
transducer inboard of them.
1-4
CAUTION
Do not cover the transducer with FRP resin.
The heat generated when the resin hardens
may damage the transducer. CHIRP transduc-
ers are especially vulnerable to heat.
Position 1/2 to 1/3 of the hull from stern.
●
15 to 30 cm off center line (inside first lifting strakes.)
●
ø22
120
28
30
68
520-5PSD
Within the wetted bottom area
●
Deadrise angle within 15°
●
ø24
120
Unit: mm
68
BOW
87
520-5MSD
DEEP V
HULL
HIGH SPEED
V HULL
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