Trawl Instrumentation

e-Sonar Wireless net monitoring system

Wireless net monitoring system that enables a Skipper of a fishing vessel to monitor and manage the performance of the trawl. Thus ensuring the trawl is fishing at its best. The final results are shorter fishing trips, bigger catches and more profit. The eSonar System is designed to offer a top quality product at a very affordable price, with the sensor functionality being fully controlled by the user.

• All sensors are wirelessly programmable
• Average battery life of up to 3 weeks for the basic sensor
• Made of a lightweight Delrin polymer
• Compatible with the Netmind Trawl Monitoring System receivers
• Multi-function sensors (user configurable)

Equipment Included:

Digital Receiver (requires PC computer, Win XP or higher):

The receiver is the component of the system that can be installed on the bridge, engine room or any other convenient location on the vessel and receives information from the hydrophone. The Receiver is the interface between the user’s display and the hydrophone. This unit is Ethernet based, thereby allowing multiple displays to be connected.

Computer Interface:	Ethernet
Data Logging:	Available for all sensors
Power:	110/220 VAC, 50/60 Hz, 30 Watts
Weight:	3kg
Accessories include:	Power supply, Ethernet cable, battery charger

Hull Mounted Hydrophone:

Hydrophones are either mounted on the hull or towed behind the vessel and receive acoustic signals from the sensors. The Hull Mounted Hydrophone has the preamp built in and is available in:

• a one piece, single transducer model, or
• a two piece, two transducer, full coverage system

Single Hydrophone configuration:
Beam Width:	50° horizontal, 50° vertical
Double Hydrophone configuration:
Beam Width:	50-80° horizontal, 50° vertical
Material:	Molded Epoxy and polycarbonate
Shielded cable for attachment to the deck unit:	15 m
Receiver:	28 kHz
Accessories:	Housing, Thru-hull fitting

Towed Hydrophone:

Towed Hydrophone is the versatile way to receive signals from the eSonar sensors. The towed hydrophone is normally deployed and towed from the side of the vessel in ice-free conditions. This unit is very popular on boats that do not plan to be in dry dock soon, or those that want to use the system on more than one vessel.

Material:	Polycarbonate housing and Molded Epoxy
Kevlar reinforced cable:	45 m
Beam Pattern:	50° Conical

SENSORS:

Linear Catch Sensor:

This sensor is used to monitor the catch rate of the trawl. When the cod end of the net expands due to the weight of the fish, the catch sensor cord is pulled causing the reading on the display to increase as the catch rate increases.

By allowing the catch rate to be monitored, the catch sensor can reduce wasted time towing with a full net, or continuing to tow when the net has passed through the body of fish. Also, by having pitch and roll available on the catch sensor, the user can reduce the occurrences of net damage due to rolling of the cod-end as the net fills. The user can install as many sensors on the net as desired to monitor the catch progress.

Measurement:	Net expansion/catch monitoring
Telemetry Frequency:	nominal 28 kHz; programmable
Weight in air:	6 kg
Battery life:	Up to 3 weeks for the basic sensor
Frequency:	Programmable
Additional measurements (Optional):	Depth, Temp, Pitch and Roll
Masimum depth:	1200m

Door Spread Sensors:

Door spread sensors ensure that the doors are in alignment and the net is not skewed or collapsed on the bottom. The addition of depth, pitch and roll to the door spread sensors ensures the doors are working properly, thereby reducing the fuel consumption and towing duration. The correct door geometry is essential in order to ensure proper trawl performance.

Measurement:	Distance between master and slave sensor, door depth and door pitch/roll.
Measurement range:	300m
Accuracy:	±1% of full scale.
Measurement Frequency:	nominal 90 kHz, programmable
Telemetry Frequency:	nominal 28 kHz, programmable
Battery life:	Up to 3 weeks for the basic sensor
Depth:	200 Bar
Pitch:	± 180°
Roll:	± 180°
Weight in air: Master Slave	6 kg 6 kg
Masimum depth:	1200m

Wing Spread Sensors:

These operate in the same way as door spread, but are mounted on the wings of the trawl.

Measurement:	Distance between master and slave sensor, wing pitch/roll.
Measurement range:	200m
Accuracy:	±1% of full scale.
Measurement Frequency:	nominal 150 kHz; programmable
Telemetry Frequency:	nominal 28 kHz, programmable
Battery life:	Up to 3 weeks for the basic sensor
Depth:	200 Bar
Pitch:	± 180°
Roll:	± 180°
Weight in air: Master Slave	6 kg 6 kg
Masimum depth:	1200m

Headline Height Sensor:

This sensor measures the distance from the headline to the footrope and from the headline to the bottom. This sensor is also able to measure depth, pitch, roll and temperature.

The Headline Sensor ensures the proper trawl opening is maintained and the trawl is fishing at its optimal shape, thereby improving catch and minimizing time and fuel consumption.

Measurement:	Distance from headline to bottom, Distance from headline to footrope
Measurement range:	Up to 60m
Accuracy:	±1% of full scale.
Measurement Frequency:	nominal 200 kHz; programmable
Telemetry Frequency:	nominal 28 kHz, programmable
Battery life:	Up to 3 weeks for the basic sensor
Depth:	200 Bar
Pitch:	± 180°
Roll:	± 180°
Weight in air:	6 kg
Temperature:	-2 to + 30° C
Masimum depth:	1200m

Multi-function sensor:

This sensor can report up to 4 parameters from a certain position on the trawl. Knowing these parameters will help achieve more effective harvesting of a particular species. Since many species prefer a narrow range of temperatures, this information can be extremely beneficial.

Measurement:	Water Temperature
Measurement range:	-2 to + 30°C
Accuracy:	± 0.1°C
Battery life:	Up to 3 weeks for the basic sensor
Depth:	200 Bar
Pitch:	± 180°
Roll:	± 180°
Weight in air:	6 kg

Grid Sensor:

This sensor is mounted on the trawl grid using a mounting bracket and monitors the grid angle, thus allowing the skipper to make the necessary adjustments to his trawl in order to correct and maintain the optimum fishing angle. The Grid Sensor can perform angle measurements from 0° to 180° with an accuracy of ±1°. The sensor is powered by a rechargeable Lithium Ion battery which has an operating life of 400+ hours between charges. Like the other sensors, the Grid sensor can also monitor depth.

Measurement:	Tilt
Measurement range:	0° to 180°
Accuracy:	± 1°
Battery life:	Up to 3 weeks for the basic sensor
Depth:	200 Bar
Pitch:	± 180°
Roll:	± 180°
Weight in air:	6 kg
Masimum depth:	1200m

Bottom Contact sensor:

The Bottom Contact sensor is suspended vertically from the footrope of the trawl. When the trawl is off the bottom, the sensor hangs close to the vertical position, thus the bottom contact sensor will indicate approximately 90° showing that the trawl is not on the bottom. When the trawl is on the bottom, the sensor will be in a horizontal position and will indicate approximately 0°, showing that the trawl has touchdown.

Measurement:	Tilt
Measurement range:	0° to 180°
Accuracy:	± 1°
Battery life:	Up to 21 days for a basic sensor
Depth:	200 Bar
Pitch:	± 180°
Roll:	± 180°
Weight in air:	6 kg
Masimum depth:	1200m

 

 

Trawl sounder Simbia SI-6110

• Using all advantages of echo sounder software Simrad ES60
• Color 15″, 17″ or 19″ LCD display, 1024 Ч 768 pixels
• Wide dynamic range of target detection, from plankton to rock bottom
• Optional usage of 200 or 38 kHz channel as echo sounder
• Separate and combined presentation of echo sounder and trawl souner data in one display
• Linear record and accelerated playback of up to 300 hrs of recorded data
• Grafic and numeric of trawl movements and trawl water temperature
• Trackball operation and multi-language menu, similar to ES60
• Shockproof compact trawl unit
• Cable connection between trawl unit and onboard equipment, using cable winch
• Cable and trawl unit status control
• Depth and fish alarms

Scope of delivery:

• SI-110 (SI-110M) trawl units
• Processor unit
• GPT 50kHz transceiver (Simrad)
• SI-53 interface
• Trackball
• CD with software
• Installation kit and spare parts

Options:

• SI-110-2 (SI-110-2M) trawl units
• LCD display (15 to 20″)
• GPT 50/38 kHz & 50/200 kHz transceiver (Simrad)
• 38 kHz & 200kHz transducer (Simrad)
• Color printer
• Mouse & keyboard
• Catch sensor

Specification:

General:
Operating frequency:	50 kHz
Detection: Bottom (sand) Single fish	1000 m 300m
Main range:	from 0-5 till 0-5000 m
Range of extension:	from 5 till 5000 m
Phasing range:	manual or automatic
Max. cable length:	4000 m (option 5500 m)
Trawling range:	3-1000 m (option 5-2500 m)
Accuracy:	±1.5% (or ±3m on depth up to 200 m)
Resolution:	0.1 m
Temperature sensor Range: Accuracy: Resolution:	from -5°C to +30°C ±0.3°C 0.1°C
Trawl units Si-110 (SI-110-M) & SI-110-2 (SI-110-2M):
Max. operating depth:	1500 m (option 2500 m)
TVG:	20 lg R
Transducer beamwidth: Si-110 (SI-110-2) SI-110M (SI-110-2M)	25 Ч 25° 30 Ч 30°
Weight: SI-110 (SI-110M) SI-110-2 (SI-110-2M)	9.0 kg 11.0 kg
Dimensions: SI-110 (SI-110M) SI-110-2 (SI-110-2M)	400 Ч 320 Ч 90 mm 540 Ч 300 Ч 100 mm
SI-110 (SI-110M) trawl units are equipped with one downward transducer SI-110-2 (SI-110-2M) trawl units are equipped with two, downward and upward transducers.
Simrad display (optional, any other conventional PC display can be used):
LCD display:	17″
Resolution:	1024 Ч 768 pixels
Power supply:	220V 50Hz
Processor unit (min. configuration):
OS:	Windows NT4
Processor:	1 GHz
ROM:	256 Mb
HDD:	40 Gb
Video:	64 Mb
CD-ROM drive
GPT transceiver Simrad ES-201384:
Single channel:	50 kHz
Output power:	1 kW
Dimensions:	284 Ч 112 Ч 246 mm
Weight:	7.5 kg
Si-53 interface (transceiver-to-processor connection):
Depth and temperature output:	NMEA 0183
Digital depth and temperature indication:	2 lines of 4 symbols
Deviation indication:	acc. to depth and temperature
Output power to trawl unit:	+37V 100mA
Power supply:	220V 50Hz 6VA
Weight:	1.2 kg
Dimensions:	284 Ч 112 Ч 246 mm

 

 

Trawl sounder Simbia SI-6812

• Autonomous unit, requiring no echo sounder
• 6.5-inch color display JMC (Japan)
• Wide range of trawl sounder units
• “Dead zone” less than 3.5 m
• “A-Scope” and “White Line” modes
• Surface wate temperature readout (option)
• Cable and trawl unit status monitoring
• Shockproof compact trawl unit
• Basic, phased, expansion ranges
• Fish and depth alarms

Main set of equipment:
	V-6802§І Display Trawl unit SI-12 SI-50 Interface unit Mounting Kit and Spare parts
Options:
	SI-V-180 Power Supply T-300 Water temperature sensor Echosiunder Transducer RS201 Trawl unit SI-12M

Specification:
Trawl sounder SI-6812

Transducer frequency:	50 kHz
Detection ranges: bottom (sand) single fish footrope	200 m 30 m 50 m
Max. depth:	400 m

Trawl units SI-12, SI-12M

Max. depth:	400 m
Beamwidth: SI-12 SI-12M	30 ЎБ 30Ўг 40 ЎБ 40Ўг
Weight: SI-12 SI-12M	ЎЬ4.0 kg ЎЬ3,0 §Ь§Ф
Cable length: SI-12 SI-12M	ЎЬ800 m ЎЬ400 §Юm
Power Supply:	not required
Dimensions:	350 ЎБ 300 ЎБ 90 mm

Display V-6802§І with transceiver

Echosounder mode:
Low frequency:	50 kHz
High frequency:	200 kHz
Output power:	450W RMS max
Main ranges:	0-2.5 m 0-1000 m
Picture feed rates:	1/1 to 1/16
Plotter mode:
Chart scales:	1/2250 to 1/25000000
Position accuracy:	15 to 100 m
Weight:	2.5 kg
Dimensions:	250 ЎБ 280 ЎБ 120 mm
QVGA TFT-LCD display:	6.5 “
Power supply:	24 VDC, 22 W
Output:	NMEA-0183, RTCM104

SI-50 Interface

Power supply:	not required
Weight:	0.4 kg
Dimensions:	120 ЎБ 80 ЎБ 40 mm

 

 

Trawl sounders Simbia SI-3010 & SI-3110

• Autonomous unit, requiring no echo sounder
• 10-inch color display JMC (Japan)
• Wide range of trawl sounder units
• “Dead zone” less than 2.5 m
• “A-Scope” and “White Line” modes
• Graphical and numeric representation of trawlk shape line and trawl water temperature (SI-3110 only)
• Surface wate temperature readout (option)
• Cable and trawl unit status monitoring
• Shockproof trawl unit
• Basic, phased, expansion ranges
• Fish and depth alarms

Specification:

SI-3010:
	V-3002 Display SI-10 Trawl units Mounting Kit and Spare parts
SI-3110:
	V-3002 Display with NET CPU module SI-110 Trawl units Mounting Kit and Spare parts
Options:
	SI-10-2 Trawl units SI-110-2 Trawl units Power supply 220/24 V Water temperature sensor T-200 Catch sensor

Trawl sounder SI-3010 and SI-3110

Transducer frequency:	50 kHz
Detection ranges:	bottom – 1000 m single fish – 300 m footrope – 200 m
Max. lenght of communication cable (KG1-30):	4000 m

Trawl sounder SI-3100 (additionally)

Trawl water temperature: range accuracy	from –5° to +30°С ±0,3°С
Trawl depth: range option accuracy	from 3 to 2000 m from 3 to 2500 m ±0,3% (±3 m at a depth less 200 m)

Trawl units SI-10, SI-110, SI-10-2, SI-110-2

Maximum immersion depth:	1500 m (option 2500 m)
TVG:	20 lg R
Beamwidth:	25 × 25°
Weight:	11.0 kg
Trawl units SI-10 and SI-110 equipped with single downward channel Trawl units SI-10-2 and SI-110-2 equipped with two channels, downward and upward

V-3002 Display

VGA TFT LCD screen:	10.4 inch
Resolution:	640 × 480
Basic ranges:	from 0-2.5 to 0-1000 m
Manual range phasing:	0-1000 m
Discrimination of trawl depth indication:	0.2 m
Discrimination of trawl water temperature:	0,1°C
Expansion ranges:	1.5-200 m
Picture feed rates:	from 1 to 1/16 and “Stop”
Power supply:	11-40 VDC, 30 W
Weight:	5.9 kg
Dimensions:	366 × 275 × 110 mm

Power supply SI-V-180

Input:	220 V AC, 50 Hz, 0.5 A
Output: SI-3010 and SI-3110 consumption permissible load	24 VDC, 2 A 24 VDC, 5 A
Weight:	less than 5 kg