3N1 Sensor

Marport's 3N1 Sensor is the only sensor of its kind on the market! The 3N1 Sensor combines the features of 3 individual sensors: the Grid Sensor, the Trawl Speed Sensor and the Symmetry Sensor. This is a very effective multi-functional sensor for twin-rigged and pair trawls.

Features

• The Grid function measures the grid angle and water flow through the trawl to provide information on the cod end filling rate. When placed on the grid at the back of the cod end, the sensor indicates the cod end filling rate.
• The Trawl Speed Sensor function measures water flow through the trawl opening and tunnel. Placed on the trawl net, it helps to properly adjust true trawl speed based upon prevailing currents and tides.
• The Symmetry Sensor function measures the direction and strength of cross currents entering the trawl. Placed on the headrope, it helps to reduce cross current effects to zero by adjusting the warp lengths, ensuring optimal trawl performance.

Benefits

• When placed on the cod-end, provides accurate information on how fish are accumulating in the cod-end based on changes in the grid, and this can indicate the filling rate.
• Allows the true trawl speed to be adjusted based upon prevailing currents and tides resulting in improved efficiency by towing directly into the current.
• Allows cross current effects to be reduced to zero by adjusting the warp lengths, thereby ensuring optimal trawl performance. A very effective sensor for twin-rigged and pair trawls.