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

ECDIS에 의한 외끌이 기선저인망 어선의 투양망 조업 과정의 실시간 모니터링

  • Lee, Dae-Jae (Division of Marine Production System Management, Pukyong National University) ;
  • Byun, Duck-Soo (Navigation Training Team, Korea Institute of Maritime and Fisheries Technology)
  • 이대재 (부경대학교 해양생산시스템관리학부) ;
  • 변덕수 (한국해양수산연수원 운항교육팀)
  • Published : 2007.11.30

Abstract

This paper describes on the real-time monitoring of net setting and hauling process for fishing operations of Danish seine vessels in the southern waters of Korea as an application of a PC based ECDIS system. Tracking of fishing process was performed for the large scale Danish seine vessel of G/T 90 and 350 PS class using the fishing gear which the length of net, ground rope, head rope and sweep line including warp in both sides were 86m, 104m, 118m and 3,200m, respectively. Tracking information for net setting and hauling process was continuously recorded for 23 fishing operations performed on November and December, 2003. All measurement data, such as trawl position, heading, towing course and past track which was individually time stamped during data acquisition, was processed in real time on the ECDIS and displayed simultaneously on the ENC chart. The results indicated that after the separation of a marker buoy from Danish seiner, the averaged running speed of vessel and the averaged setting period while shooting the seine on the course of diamond shape 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 period while closing the seine on the straight route was 1.0 knots and 47.0 minutes, respectively. After the closing stage of hand rope, the hand rope was towed by the averaged speed of 2.2 knots during the 13.0 minutes. The average area for route of diamond shape swept by sweep lines of the seine in 23 fishing grounds was $709,951.6m^2$. Further investigation is also planed to provide more quantitative tracking information and to achieve more effective surveillance and control of Danish seine vessels in EEZ fishing grounds.

Keywords

ECDIS;Danish seine vessel;Fishing process;Position tracking;Estimation of sweep area

References

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Cited by

  1. Species Composition and Community Structure of Demersal Fish Caught by a Danish Seine Fishery in the Coastal Waters of the Middle and Southern East Sea, Korea vol.48, pp.4, 2015, https://doi.org/10.5657/KFAS.2015.0529