1. INSTALLATION
4
8. Fit the Display Unit to the mounting hole, taking care that the threaded rods are
aligned with the bolts holes drilled at step 4.
9. Fit the flat washers and nuts to the threaded rods.
10. Fasten the nuts to secure the unit in place.
1.2
Radar Sensor (DRS4W) Installation
The optional radar sensor (DRS4W) has no power switch. To turn the sensor on/off,
the sensor must be connected to the switchboard or a similar power-governance de-
vice. For DRS4W installation instructions, see the manual included with the DRS4W.
Cons
ole
Console
Mounting
hole
1. INSTALLATION
5
1.3
Transducer Installation
1.3.1
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 located
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 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.
CAUTION
Do not transmit with the transducer out of water.
The unit and transducer may be damaged.
●
Within the wetted bottom area
●
Deadrise angle within 15°
●
Position 1/2 to 1/3 of the hull from stern.
●
15 to 30 cm off center line (inside first lifting
strakes.)
DEEP V
HULL
HIGH SPEED
V HULL
28
22
120
68
30
24
120
68
87
Unit: mm
520-5PSD
520-5MSD
BOW
