British Columbian trawl

a midwater trawl set from the stern. It has curved doors (q.v.) at the end of wire side pennants (or lines) which allows for a wider opening of the net when fishing. The mouth of the net is square and the net has four equally tapering sides. There is no cod end but a section of the net can be opened to empty the catch. The headline has aluminium planing floats, which cause the net to arch upwards, and an iron depressor at each lower corner of the net to pull downwards. Used to catch herring