Notus is a developer and manufacturer of advanced net monitoring solutions for the commercial fishing industry.
Wireless Monitoring Sensors for Bottom Trawlers
(CANADA, 10/2/2013)
Notus Electronics Ltd (Notus) has been developing wireless net monitoring sensors for trawlers and seiners for the past 20 years. As trawl gear changes, so to must the devices that monitor this gear.
One recent trend with tremendous implications for the industry is semi pelagic doors for bottom trawls. These doors typically fly just off the ocean floor while the trawl remains on bottom. Crucial to the proper operation of the door is the height from the door to the ocean's bottom.
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The trawl door height is the distance from the door to the ocean floor. |
To properly monitor these doors, Notus developed a Trawl Door Height Sensor. A single sensor can provide trawl door height, door spread, trawl warp length and door angle.
The trawl door height is the distance from the door to the ocean floor (typically 1-2 fathom).
This information is calculated using a sounder inside the sensor that detects height off the ocean floor.
Optimal performance of these doors is achieved when the doors are equal height from the ocean floor. Flying the doors too high may bring the trawl off bottom.
Gear damage and reduced fishing may result from the doors impacting the bottom.
To ensure proper orientation and accurate height readings, door angle is also measured.
This sensor also monitors other critical pieces of information like door spread and trawl warp length.
Door spread (distance between the doors) is calculated by installing a slave on the opposite door.
Trawl warp length is measured to an accuracy of better than 0.5 meters.
This new sensor was successfully tested on the FV Frank Maiken out of Skagen Denmark. Twin trawl gear was used while flying the doors.
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This sensor also monitors other critical pieces of information like door spread and trawl warp length. |
The Trawl Door Height Sensor can be added to most Notus Trawlmaster systems by simply updating the software and adding the sensor(s).
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The FV Frank Maiken. |
About Notus Electronics Ltd
Notus Electronics Ltd is a developer and manufacturer of advanced net monitoring solutions for the commercial fishing industry. Established since 1992, the company has brought a number of sophisticated wireless monitoring systems to the market. The overall driving force behind development and marketing has been reliable products that remain affordable for all size vessels.
Notus' head office is located in Newfoundland, Canada. Notus has also established branch offices in the United Kingdom (Notus UK) and in Spain (Notus Marítima). Both branch offices are managed by ex Captains and provide full sales and service.
Notus' products are supported in other countries via a wide network of distributors and dealers that have been comprehensively trained in service.
Source: Notus Electronics Ltd
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Margaret E.L. Stacey
Editor Companies and Products
editorial@seafood.media
www.seafood.media
Information of the company:
Address:
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West Empire Plaza, Unit 11, 391-395 Empire Ave
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City:
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St.John's
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State/ZIP:
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Newfoundland (A1E 1W6)
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Country:
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Canada
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Phone:
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+1 709-753 0652
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Fax:
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+1 709-753 0651
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E-Mail:
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notus@notus.ca
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More about:
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