The present invention relates to a trawl steering system comprising a sea vessel and a trawl system. The system including a measuring unit for detecting and monitoring 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 for monitoring the position of the trawl relative to said target volume. The system also comprises sampling means for sampling information including wind, current, and vessel and trawl characteristics and a route estimator for calculating an optimal trawl path and controller means for adjusting vessel and trawl parameters so as to provide a movement for the trawl toward the target volume along said optimal path and thus increase the catch and reducing the bunker consumption and associated environmental impact.
