B T O R T A T W O L M 1 2 3 4 5 6 7 HAMPIÐJAN Hemmer 8 By using T90 less netting is needed in the trawl. 9 The Hemmer trawl is a modern bottom trawl that is constructed differently to demersal trawls already on the market. 10 This involves working with netting in a T90 configuration that needs to be cut and mounted in completely different way to those in a regular bottom trawl. In tank tests, this was shown to work extremely well. By using T90 configuration, less netting is 11 needed in the trawl, which gives better water flow through the gear and therefore less resistance. Using T90 netting in a complete trawl is something that hadn’t been done before. 12 A model of the the Hemmer was tested in the flume tank in Hirtshals. These tests came out so well that it was decided to set up a full-size trawl. 13 The full-size trawl gear was filmed with an underwater cameras and the footage cthoenfuirnmuesudaal lwl tahyeopf oussiitnivgetpheoinnetsttainbgo.ut the trawl that had been expected, not least 14 The Hemmer trawl is used by many deep-sea trawlers in Icelandic waters and abroad with great success. It is a very robust trawl that works well on rough grounds without 15 much damage. The trawl netting is effectively stretched on the frame lines with very little or no slack 16 in contact with the bottom, resulting in an excellent trawl with minimum repair and maintenance costs. 17 18 19 hampidjan.com 20
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