Instrumentation for the engineering study of otter trawls.

barcos para pesca a la rastra chalutage chalutier conception corrientes de agua courant d'eau data processing depth design echosounding electronics engineering equipo de pesca fishery management fishing gear fishing nets hydrodynamics hydrodynamique instrument de mesure measuring instruments pesca a la rastra procesamiento de datos profondeur profundidad redes de pesca trawlers trawling water currents