The present invention relates to trawl doors used in trawl fishing, including shallow water trawl fishing applications, deep water trawl fishing applications, bottom trawl fishing applications as well as at pelagic trawl fishing applications. The invention also relates to seismic surveillance line spreading and spreading of other items towed in water. The present invention provides an improved device for adjusting the weight of trawl doors where the trawl doors are hanging in the trawl block at the stern, up in the high seat on large multi-purpose fishing vessels or in the gallows on the side on a trawler or trawling boat.
