Traapüük
the trawl opening. Regarding the rigging, for getting the correct vertical opening, groups of floats
or buoys are often attached to each of the upper wings, the headline extremities and weights are
hung at the extremities of the two lower wings or a few meters before them. The distance
between the two pair trawlers and the towing speed are also very important element for the trawl
opening. In general, a netsounder (vertical echo-sounder fixed on the trawl itself) is used to
control the opening of the trawl and its position versus the surface or the bottom.
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· 09.september lõpp
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1. Searching for fish : The first part of the operation is the search for fish, by means of
echo-sounder and sonar.
2
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