The Doors (or Otter Boards)

These great big lumps of metal are towed behind trawlers. Their aquadynamic shape help to keep the ‘mouth’ of the trawl net open (a bit like wings flying through the water) and the hapless fish are caught in the net, never to escape.

The Doors (or Otter Boards) - Richard Broom Photography
The Doors (or Otter Boards) – Richard Broom Photography
Old fashioned otter boards (image courtesy Wikipedia)

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