Scanmar ScanScreen and ScanBas365 catch control and net monitoring

Pathway, like her sistership Kings Cross, is equipped with the next generation of ScanScreen and ScanBas365 catch/net monitoring system from Scanmar Ltd.

George Youngson MD Scanmar Ltd explained: “We are at a transition stage on software and how information on the quantity of fish in the trawl is presented on screen in the wheelhouse of a pelagic vessel. Today, skippers require not only more information, but, more importantly, they require the information more quickly. We are very lucky to have a market such as the pelagic fleet in the UK and Ireland, which are as optimistic about the future as we are.

“With the new generation ScanScreen software, Scanmar will provide a whole new concept of catch control, including functions not seen before, including a ‘gear geometry’ unique to their own individual needs. The tracking of the fish from headline to codend will not only be much easier, but more accurate in relation to time. Time is important while trawling for pelagic species, and Scanmar has been working during the past four years to perfect the information at hand and to provide a more accurate assumption of what’s happening during the towing phase. With our reliable data link from sensor to ship, we can achieve this.”

Pathway uses a Scanmar Twin Trawl Eye system (mounted on both the headline and the tunnel) for information of where fish are located within the trawl. The update rate from trawl to vessel from both trawl eyes is 1.3 seconds simultaneously.

The Scanmar SS4 Trawl Door sensors were ordered to provide information as to where the doors are situated in relation to the surface, especially when the fish are swimming close to the surface. Particularly during the autumn fishery, mackerel can be high up in the water column at times, requiring skippers to hold the doors close to the surface to keep the trawl opening at the required depth of targeted marks.
In these situations, while trawl door distance is important, trawl door depth and angle are essential to show how the trawl doors are behaving.

Five SS4 Super catch sensors are located throughout the length of the bag for fast update when the fish eventually travel down into the codend.

Sensor signal reception while trawling is collected from four H4 B30 x 50 single-beam hydrophones mounted on both port and starboard blister housings, while purse-seine activities are aided with one H3 B30 x 90 3-beam purse hydrophone.

During purse-seining activities, Pathway will benefit from two combined SS4 depth and height sensors.

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