For other types of trawlers, see Trawler. A fishing trawler is a commercial fishing vessel designed to operate fishing trawls. Trawling sea fishing knots pdf a method of fishing that involves actively dragging or pulling a trawl through the water behind one or more trawlers.
There are many variants of trawling gear. They vary according to local traditions, bottom conditions, and how large and powerful the trawling boats are. A trawling boat can be a small open boat with only 30 horsepower or a large factory ship with 10,000 horsepower. Painting of A Brixham trawler by William Adolphus Knell. The painting is now in the National Maritime Museum.
During the 17th century, the British developed the Dogger, an early type of sailing trawler commonly operated in the North Sea. The Dogger takes its name from the Dutch word dogger, meaning a fishing vessel which tows a trawl. The modern fishing trawler was developed in the 19th century, at the English fishing port of Brixham. By the early 19th century, the fishermen at Brixham needed to expand their fishing area further than ever before due to the ongoing depletion of stocks that was occurring in the overfished waters of South Devon.
The elegant Brixham trawler spread across the world, influencing fishing fleets everywhere. By the end of the 19th century, there were over 3,000 fishing trawlers in commission in Britain, with almost 1,000 at Grimsby. The earliest steam powered fishing boats first appeared in the 1870s and used the trawl system of fishing as well as lines and drift nets. The earliest purpose built fishing vessels were designed and made by David Allan in Leith in March 1875, when he converted a drifter to steam power. In 1877, he built the first screw propelled steam trawler in the world. The first steam boats were made of wood, but steel hulls were soon introduced and were divided into watertight compartments.