Simrad ITI TRAWL Instruction Manual
Instruction manual
Simrad ITI Trawl System
Serial data communication and
NMEA 0183 message description
111110 10 00101 0101 010
010101001 00010100011
010101010 00101010100
10101001100001111.................
Simrad ITI Trawl system
Serial data communication and
NMEA 0183 message description
Instruction manual
857--164777 / Rev.A
Note
Simrad AS makes every effort to ensure that the information contained within this
document is correct. However, our equipment is continuously being improved and
updated, so we cannot assume liability for any errors which may occur.
Warning
The equipment to which this manual applies must only be used for the purpose for which
it was designed. Improper use or maintenance may cause damage to the equipment or
injury to personnel. The user must be familiar with the contents of the appropriate manuals
before attempting to operate or work on the equipment.
Simrad AS disclaims any responsibility for damage or injury caused by improper
installation, use or maintenance of the equipment.
Copyright
E 2003 Simrad AS
ISBN 82-8066-013-5
The information contained within this document remains the sole property of Simrad AS.
No part of this document may be copied or reproduced in any form or by any means, and
the information contained within is not to be communicated to a third party, without the
prior written consent of Simrad AS.
Support
For support on your Simrad equipment, consult your local dealer, visit www.simrad.com,
or contact us directly at support.fish@simrad.com.
Simrad AS
Strandpromenaden 50
Box 111
N-3191 Horten
Telephone: +47 33 03 40 00
Facsimile: +47 33 04 29 87
A L W A Y S A T T H E F O R E F R O N T O F T E C H N O L O G Y
Sections
This book is the Instruction manual manual for the ITI system.
1INTRODUCTION
Instruction manual
2
3
ITI TRAWL SYSTEM, BASIC PRINCIPLE
ITI GEOMETRY FOR TWIN RIG
4 RESPONSIBILITY
5 SERIAL LINES
6 NMEA 0183 MESSAGES, DEFINITIONS
7NMEA–
ABBREVIATIONS, ITI AUX MENU SELECTIONS
(Cd6911)
M/S simrad Echo, our research and demonstration vessel
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I
Simrad ITI
Remarks
References
Further information about the ITI system supplied may befound in the following manual s:
• ITI Installation manual
• ITI Trawl Eye Instruction manual
II
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Instruction manual
Contents
1INTRODUCTION 1..........................................
2 ITI TRAWL SYSTEM, BASIC PRINCIPLE 2................
3ITIGEOMETRYFORTWINRIG 3..........................
4 RESPONSIBILITY 5........................................
5 SERIAL LINES 6............................................
Transmitted messages 6..........................................
Received message 8.............................................
Serial line configuration and pin allocations 9.........................
Serial port pin assignments 10......................................
6 NMEA 0183 MESSAGES, DEFINITIONS 11.................
Message description 11............................................
NMEA output from ITI 12.........................................
NMEA Input to ITI 23.............................................
Telegram from Winch Syncro 2020 25...........................
7 NMEA – ABBREVIATIONS, ITI AUX MENU SELECTIONS 26
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III
Simrad ITI
Document logistics
Rev Date Written Checked A pproved
A 23.09.03 GM KRA KRA
B
C
D
(The original signatures are recorded in the company’s logistic database.)
Rev Comments
A Original issue.
B
C
D
To assist us i n making improvements to the product and to this manual, we would welcome
comments and constructive criticism. Please send all such - in writing or by e-mail - to:
Simrad AS
Documentation Department
P.O.Box 111
N-3191 Horten
Norway
IV
or e-mail:
simrad.documentation@simrad.com
857-164777 / A
Instruction manual
1INTRODUCTION
Note This document is intended for software engeneers. It is to be used
for writing codes in order to communicate with the ITI system.
With the rapid development of marine electronic devices, it has
become necessary to develop a standardised interface protocol for
exchanging data between devices regardless of the device
manufacturer. The NMEA 0183 standard protocol for interfacing
electronicmarinedeviceshas been implementedin the ITIsystem.
The most common way of connecting electronic equipment is to
use serial lines.
A more powerful way of integrating, is the Ethernet standard with
highersignalling capacity. The softwarerequired to communicate
over the Ethernet is includedi n the ITI system, however a standard
ITI does not include the hardware required.
A dedicated interface/display board containing the Ethernet
hardwa re must be installed.
→ Please refer to the Simrad ITI Installation Manual, Appendix 1
page 3 – 17 for more details.
The ITI system has four serial lines available for external
equipment connection.
→ Please refer to page 6 for more details.
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Simrad ITI
2 ITI TRAWL SYSTEM, BASIC PRINCIPLE
The Simrad ITI wireless trawl positioning and monitoring system
is designedto improvecontrol andefficiency inpelagic andbottom
trawling. Small robust battery powered sensors mounted on the
trawl, transmit important information to the vessel on request.
• The ITI provides the skipper with exact position of the gear and
what is happening in and around the trawl. It also provides all
crucial information for an effective, profitable and responsible
fishing.
• The ITI is a modular system. From a basic unit of one sensor,
the ITI system can be extended to a complete and advanced
instrument package according to the customers requirements.
Trawl Eye
Distance and
Speed sensor
Depth and
Temperature Sensor
Catch Sensor
Simrad’s philosophy is to reduce integration costs and increase the
benefit of our products to let data from the ITI be available for
integration with external equipment like chart plotters, winch
control systems etc.
2
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3 ITI GEOMETRY FOR TWIN RIG
Settingup a three wire Twin Rig system is a questionof findingthe
balance point between a number of forces. The adjustment of the
centre warp is very critical. This is one of the reason for the
positioning of the clum p, and hence the balance of forces between
the doors and the warp and sweeps being so critical to get a square
tow.
• The ITI Geometry System provides the skipper with crucial
informationto adjustthe Twin Rig correctlyand henceoptimise
the efficiency of both trawls during the tow.
The ITI Geometry System is based on measurements of the
distance from the vessel to both trawl doors and to the clump. In
addition, the distances between each door and the clump are
measured based on transponders attached to the clump. Based on
these range measurements, the geometry of the Twin Rig is
calculated with high accuracy since all measurementsare relative
to each other.
Instruction manual
310 307 309
28
1.3
30
(Cd6891)
Theclump positionrelative to a straightline betweenthedoorswil l
affect the geometry of the trawl.Toget a square tow, the deviation
from the straight line position should be close to zero.
This is a focus point for the ITI Geometry System. In addition, the
angle between the true course over ground (VTG) and the straight
line between the doors are calculated and displayed.
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