Abstract: A trawler door with relative dimensions such that the height of the door is at most seventy five percent of its length. Two longitudinally arcuate platelike body parts are joined along a longitudinal edge at an obtuse angle, the joint between the body parts being stiffened by a platelike reinforcing member extending along the length of the joint. At least one of the body parts is stiffened by at least one tubelike member of circular or elliptical cross-section which is affixed at one end to the reinforcing member and at the other end to a suitable location on one of the body parts.