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This paper describes on the real-time monitoring of net setting and hauling process for fishing operations ofDanish seine vessels in the southern waters of Korea as an application of a PC based ECDIS system. Trackingof fishing process was performed for the large scale Danish seine vessel of G/T 90 and 350 PS class using thefishing gear which the length of net, ground rope, head rope and sweep line including warp in both sides were86m, 104m, 118m and 3,200m, respectively. Tracking information for net setting and hauling process wascontinuously recorded for 23 fishing operations performed on November and December, 2003. Allmeasurement data, such as trawl position, heading, towing course and past track which was individually timestamped during data acquisition, was processed in real time on the ECDIS and displayed simultaneously on theENC chart. The results indicated that after the separation of a marker buoy from Danish seiner, the averagedrunning speed of vessel and the averaged setting period while shooting the seine on the course of diamondshape to surround the fish school in the 23 fishing operations were 8.3 knots and 13.1 minutes, respectively.And with the maker buoy taken on board, the averaged running speed of vessel and the averaged towing periodwhile closing the seine on the straight route was 1.0 knots and 47.0 minutes, respectively. After the closingstage of hand rope, the hand rope was towed by the averaged speed of 2.2 knots during the 13.0 minutes. Theaverage area for route of diamond shape swept by sweep lines of the seine in 23 fishing grounds was709,951.6m

Real-time monitoring of net setting and hauling process in fishing operations of Danish seine vessel using ECDIS