aperture of trawl

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Vessel monitoring system — Vessel monitoring systems (VMS) are used in commercial fishing to allow environmental and fisheries regulatory organizations to monitor, minimally, the position, time at a position, and course and speed of fishing vessels. They are a key part of… … Wikipedia
Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) … Wikipedia
Ichthyology terms — Ichthyology uses several terms that are unique to the science.Contents: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z NOTOC A * Abdomen: belly * Abdominal: pertaining to the belly * Actinosts: a series of bones at the base of the pectoral… … Wikipedia

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