Trawl towed by a single boat. The horizontal opening of the net is controlled by otter boards, usually of a hydrodynamic shape, which normally do not touch the ground. ( Nedelec and Prado, 1990).
MIDWATER OTTER TRAWL
Meaning of MIDWATER OTTER TRAWL in English
Fishery English glossary. Английский глоссарий рыболовства . 2012