Method and device for operation of a trawl
First Claim
1. Process for control of one or ore trawls, each comprising a trawl bag, and which are towed after a vessel, where the one or more trawls via a number of cables are connected to cable tension regulating means on the vessel, and where means contribute to maintaining the opening of the trawl outstretched during the movement through the sea, wherein the individual tension in one or more of the cables is regulated on the basis of measurements of the direction of the resulting water flow adjacent to the trawl, so that the resulting water flow has direction directly towards the opening of the trawls.
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Accused Products
Abstract
There is referred to a process and an arrangement for control of one or more trawls (12, 40, 42) which are towed after a vessel (10), where the trawl(s) (12, 40, 42) are connected to the vessel by means of a number of cables (16, 14; 44, 45, 46), and where one or more devices (22, 24) contribute to maintaining the trawl(s) opening(s) outstretched during the movement through the sea and the invention is characterized in that the individual traction (FW1, FW2, FW3) in the cables (44, 45, 46) is regulated on the basis of measurements of the direction of flow (P3) of water adjacent to the trawl or the trawls.
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Citations
9 Claims
- 1. Process for control of one or ore trawls, each comprising a trawl bag, and which are towed after a vessel, where the one or more trawls via a number of cables are connected to cable tension regulating means on the vessel, and where means contribute to maintaining the opening of the trawl outstretched during the movement through the sea, wherein the individual tension in one or more of the cables is regulated on the basis of measurements of the direction of the resulting water flow adjacent to the trawl, so that the resulting water flow has direction directly towards the opening of the trawls.
- 5. Arrangement for control of one or more trawls having a trawl bag and which are towed after a vessel where the at least one trawl via a number of cables are connected to cable tension regulating means on the vessel and comprising trawl outstretching means for maintaining the one or more trawl openings stretched out during the movement through the sea, characterized in that a number of sensors is arranged adjacent to the trawl for measuring the direction of resulting flow of the water adjacent to the trawl, which one or more sensors is/are signal-connected to the cable tension regulating means and tension on the basis of said flow measurements so that the resulting flow of water has a direction directly towards the opening of the trawls.
Specification