Learn about how boulders and large stones can be prevented from becoming caught in a demersal (bottom) trawl during fishing.
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'Flip-up rigs' fitted to a trawl when working on stony ground can often save fishing crews time and money in repairs. A flip-up rig will also help a trawl to glide safely over obstacles that would otherwise cause the trawl to become fast (snagged).
The video includes footage of a 1/15 scale model trawl in a flume tank, together with underwater observations of a full size trawl operating on stony ground. Contact Sea Fish Industry Authority - or visit our website - for more information on how to construct a flip-up rig suitable for your trawl.
Executive producer: Mike Montgomerie
Edited by: Julian Swarbrick
©Sea Fish Industry Authority 2003
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