This edition further updates and enhances a standard work which has proved of practical value over many years. Starting with the empirical development of trawl gear, it goes on to discuss trawl nets in details, conventional trawl net assembly and rigging practices. It then deals with developments away from conventional trawl net design, the design and efficiency of otter boards, gear for stern trawlers and operational procedures. New material included further reference to ground trawling with two vessels, trawl net tendencies, with more information on section on main clips, links and other ironware used in trawling and a list of technical terms. The whole book is vividly illustrated with detailed drawings and specifications while a dramatic series of photos of trawling operations has been added.