Trawl steering system comprising a sea vessel and a trawl system having a trawl, the trawl steering system including: - a measuring unit adapted to detect and monitor the position and movements of a target volume in the sea, the target volume constituted by a school, veil or haze of fish or shrimps to be caught in the trawl, and to monitor the position of the trawl relative to said target volume; - sampling means adapted to sample information including wind, current, and vessel and trawl characteristics; - a trawl pilot comprising a route estimator adapted to calculate an optimal trawl path and a trawl pilot control adapted to send signals to the vessel; and - controller means adapted to adjust vessel and trawl parameters so as to provide a movement for the trawl toward the target volume along said optimal path, and to receive commands from the trawl pilot; - steering means comprising: - weights, doors or deflectors arranged on the trawl, and wherein the weights doors or deflectors are adapted to receive control signals from the controller means and to adjust the position of the trawl relative to the sea vessel; - trawl towing points on the vessel, wherein the trawl towing points are movable laterally and/or vertically on the vessel, and towing wire being adjustable in length; and - automation systems, hardware and software systems, which are based on artificial intelligence to provide a hierarchical list of actions comprising a priority of navigational means to ensure the safest trawl path using the least amount of energy, said hierarchical list of actions including one or more of: - adjustment of the weights, doors or deflectors, - lateral and/or vertical movement of the trawl towing points on the vessel, possibly including length adjustment of the towing wires, and - use of the vessel's rudder and propulsion power. - a measuring unit adapted to detect and monitor the position and movements of a target volume in the sea, the target volume constituted by a school, veil or haze of fish or shrimps to be caught in the trawl, and to monitor the position of the trawl relative to said target volume; - sampling means adapted to sample information including wind, current, and vessel and trawl characteristics; - a trawl pilot comprising a route estimator adapted to calculate an optimal trawl path and a trawl pilot control adapted to send signals to the vessel; and - controller means adapted to adjust vessel and trawl parameters so as to provide a movement for the trawl toward the target volume along said optimal path, and to receive commands from the trawl pilot; - steering means comprising: - weights, doors or deflectors arranged on the trawl, and wherein the weights doors or deflectors are adapted to receive control signals from the controller means and to adjust the position of the trawl relative to the sea vessel; - trawl towing points on the vessel, wherein the trawl towing points are movable laterally and/or vertically on the vessel, and towing wire being adjustable in length; and - weights, doors or deflectors arranged on the trawl, and wherein the weights doors or deflectors are adapted to receive control signals from the controller means and to adjust the position of the trawl relative to the sea vessel; - trawl towing points on the vessel, wherein the trawl towing points are movable laterally and/or vertically on the vessel, and towing wire being adjustable in length; and - automation systems, hardware and software systems, which are based on artificial intelligence to provide a hierarchical list of actions comprising a priority of navigational means to ensure the safest trawl path using the least amount of energy, said hierarchical list of actions including one or more of: - adjustment of the weights, doors or deflectors, - lateral and/or vertical movement of the trawl towing points on the vessel, possibly including length adjustment of the towing wires, and - use of the vessel's rudder and propulsion power. - adjustment of the weights, doors or deflectors, - lateral and/or vertical movement of the trawl towing points on the vessel, possibly including length adjustment of the towing wires, and - use of the vessel's rudder and propulsion power.