Some Technical Aspects on Mid Water Trawl Operation Lesson Learn from Operations by M.V. SEAFDEC 2 around Vietnam Waters

Abstract

Twelve 912) midwater trawl fishing operation are operated by M.V. SEAFDEC2 around Central part of Viet Nam Waters during 5-26 June-18 July 2012. Study aims to obtain data of midwater net vertical opening. Depth recorders i.e. Net sonde and Depth loggers are set with trawl net. Net Sonde is installed to record the real-time and monitor depth of ground rope. Two (2) sets of Depth loggers are set at ground rope and float rope to recorded depth of capture and vertical opening. Result of fishing operation is revealed the vertical opening of net is 8 to 15 m. Obviously that weather condition and sea current causes trouble to fishing operation and safety of fishing crews. Sea depth should not be shallower than 40 m. Modification of midwater trawl net, i.e. reduce scale of net, change some lighter weigh material, should be priority to study in the future. In addition, to enhance performance skill of deck crew, midwater trawling should be frequency operated.