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Stabilization of ship's heading in AIS of fishing vessel by a hybrid GPS/EM compass

어선 AIS에서의 하이브리드 GPS/EM 컴퍼스에 의한 선수방위 안정화

  • Lee, Yoo-Won (Division of Marine Production System Management, Pukyong National University) ;
  • Jo, Hyeon-Jeong (Dept. of Marine Police and Technology, GangWon Provincial Collage) ;
  • Lee, Dae-Jae (Division of Marine Production System Management, Pukyong National University)
  • 이유원 (부경대학교 해양생산시스템관리학부) ;
  • 조현정 (강원도립대학 해양경찰과) ;
  • 이대재 (부경대학교 해양생산시스템관리학부)
  • Published : 2010.02.28

Abstract

The ship's heading information of hybrid GPS/EM compass were applied to the AIS of fishing vessel and examined the possibility of accuracy improvement. It is observed 453 each in AIS receiver of land among 3,982 each in AIS Rx/Tx transponder of the test ship at sea, and transmission interval according to the speed of ship is determined the 11.4% good transmitting data of the all information. In results, maximum compass error for the ship's heading of an EM compass was $19.1^{\circ}$. The variance of ship's heading owing to the speed of ship is surveyed. The COG (Course Over Ground) was changed extremely in $180^{\circ}W-179^{\circ}E$ range under 4.9knots, and in $24^{\circ}W-23^{\circ}E$ range over 4.9knots. Finally, using the ship's heading of EM compass and the COG from GPS for the autopilot system of a small fishing boat and the ship's heading information of AIS results in danger on the own ship's navigation safety and leads to make confusion both the others and VTS (Vessel Traffic Service) center. Therefore, the hybrid GPS/EM compass is identified as the best system for a small fishing boat and is allowed to offer continuously a ship's heading information with high accuracy and stability.

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