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iii
FOREWORD
Introduction
FURUNO Electric Company thanks you for
considering and purchasing the TS-331A
Wired Trawl Sonar. We are confident you
will discover why the FURUNO name has
become synonymous with quality and
reliability.
The TS-331A is a wired trawl monitoring
system designed to improve control and
efficiency in pelagic and semi-bottom
trawling. Mainly consisting of an
Underwater Unit, a Surface Processor Unit
and a Mouse, the TS-331A presents data
received from a trawl-mounted transducer
on high quality and low-noise images.
No machine can perform to the utmost of its
ability unless properly installed, maintained
and operated. Please read and follow the
recommended procedures for operation
and maintenance to get the most out of the
equipment.
Features
The TS-331A is a third wire, head rope
mounted system incorporating a high
resolution scanning sonar designed
especially for monitoring the opening of the
trawl net and surrounding areas. Also
included are depth and temperature
sensors, a 120kHz downward looking echo
sounder, four catch indicators, and a pitch
and roll indicator for monitoring the attitude
of the trawl unit. The trawl unit is connected
to the Surface Processor Unit by a
2-conductor cable. This cable provides 130
VDC power to the trawl unit as well as
two-way communications.
Some of the main features are
• High resolution net profile
• Graphic presentation of net attitude
• Three display modes: polar (0°-360°),
locked (echo sounder) and sector (0°-
180°)
• Four catch sensors (option) may be
mounted on the codend to monitor catch.
Notice
• No part of this manual may be copied or
reproduced without written permission.
• If this manual is lost or worn, contact your
dealer about replacement.
• The contents of this manual and
equipment specifications are subject to
change without notice.
• The example screens (or illustrations)
shown in this manual may not match the
screens you see on your display. The
screen you see depends on your system
configuration and equipment settings.
• This manual is intended for use by native
speakers of English.
• FURUNO will assume no responsibility
for the damage caused by improper use
or modification of the equipment or
claims of loss of profit by a third party.