MARELEC's push and pull warp speed

By integrating warp-pull measurement in the winch spooling-gear you also achieve symmetrical positioning of the net perpendicular to the water-flow. It says warp-pull control is much more sensitive than flow-direction control and effectively shows up four times better on the meters, to give a quick and accurate adaptation of the net position.

Their system checks 6,000 times a minute, giving continuous control rather than intermittent, ultrasonic transmission of the flow-direction measurements which are usually about four times a minute. In bad weather or when turning, it still works when ultrasonic transmission of echo-sounds would become difficult or impossible. Other standard features include: net protection against overload, warp-pull balancing during fishing in different working conditions, automatic haul/shoot at pre-set lengths, visual monitor/recorder of warp-pulls and -lengths.