- trawl head
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горло траловой сети
English-Russian dictionary of geology. 2011.
trawl head
Смотреть что такое "trawl head" в других словарях:
trawl head — a strong, heart shaped iron frame fitted at each end of a trawl beam to raise it about one metre off the sea bed. The after side is straight and slopes upward of each head to stake the ropes or wires by which the trawl is towed. The sides of the… … Dictionary of ichthyology
head iron — trawl head (a strong, heart shaped iron frame fitted at each end of a trawl beam to raise it about one metre off the sea bed. The after side is straight and slopes upward of each head to stake the ropes or wires by which the trawl is towed. The… … Dictionary of ichthyology
head rope — 1) the rope along the upper margin of a net 2) the length of rope or wire in a trawl to which the top wings and cover netting are attache … Dictionary of ichthyology
trawl — 1) a bag shaped net towed behind a ship either along the sea floor or in midwater, having a buoyed head rope and a weighted foot rope to keep the net mouth open. It may be towed by one or two ships; 2) in Newfoundland … Dictionary of ichthyology
outrigger trawl — beam trawl (a trawl with short wings and a head rope attached to a metal or wooden beam, 10 m or more long, which keeps the net open horizontally and scrapes the bottom to scoop or startle fish into the net. Metal frames on each end of the beam… … Dictionary of ichthyology
otter trawl — demersal trawl operated by a single vessel in which the horizontal opening of the net is achieved and maintained by angle towed otter boards (large rectangular boards of timber or steel) and the vertical opening by a combination of floats on the… … Fisheries — dictionary
beam trawl — a trawl with short wings and a head rope attached to a metal or wooden beam 4 12 m long. The beam keeps the net open horizontally while metal frames on each end of the beam keep the net open vertically. The beam has metal runners to support it… … Dictionary of ichthyology
lozenge trawl — a midwater trawl with four seams running from the middle of the head, foot and side ropes instead of from the wing end points … Dictionary of ichthyology
sledge — trawl head (a strong, heart shaped iron frame fitted at each end of a trawl beam to raise it about one metre off the sea bed. The after side is straight and slopes upward of each head to stake the ropes or wires by which the trawl is towed. The… … Dictionary of ichthyology
sole plate — a steel plate on the bottom of an otter board or the trawl head of a beam trawl … Dictionary of ichthyology
Greater Crested Tern — Breeding plumage T. b. cristata displaying Conservation status … Wikipedia
