• Journal of Navigation and Port Research
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• v.26 no.1
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• pp.8-14
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• 2002

The collisions of vessel at sea show high among the whole marine accidents. Especially, the accidents of fishing vessels take the largest portion of the collisions. Therefore, a technique to reduce these accidents should be developed. The automatic control for avoiding collision suggested in this study consists of two steps. The first is recognizing collision risk with fuzzy Theory and the other is maneuvering the model ship on the basis of collision risk calculated from the first step. The information form the position and estimated time of collision point(DCPA and TCPA) is used to assess the collision risk. To verify this system, a fishing vessel was simulated according to MMG mathematical model. The simulations result shows quite good application in avoiding the collision of ship.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.34-36
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• 2007

현재 모형선을 이용한 선형성능 검증방법에는 크게 2가지 방법이 있다. 첫째는 예인수조에서 예인전차를 이용하여 정수중에 배를 예인시켜 그에 따른 저항을 시험하는 방법이 있고, 둘째는 회류수조에서 배를 고정하여 물을 회전시켜 모형선의 저항을 측정하는 방법이 있다. 이와 같은 방법은 저속 및 대형선박을 검증하기 위해 계발된 방법들로 소형 고속어선 및 고속레저선박의 저항성능 평가를 수행하기 어려운 것이 현실이다. 예인전차의 예인속도와 회류수조 물의 유속이 소형 고속어선 및 고속레저선박의 속력에 미치지 못하기 때문이다. 따라서 고속을 요하는 선박의 저항성능 평가를 위해 새로운 방법 연구가 필요하다. 이에 고속선의 저항성능 시험을 위해 실 해상에서 일반 선박을 이용하여 예인하는 방법을 적용하여 저항시험을 수행하였으며 그에 맞는 시스템을 설계하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.1-3
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• 2011

선박관제시스템(VMS)는 최근 선박에서 도입되어 설치된 선박자동식별장치(AIS)에 의해 많은 정보를 획득하여 처리하고 있으나 AIS가 미설치된 소형선박, 어선 및 기타선박들에 대해 지속적으로 설치를 확대하고 있다. 특히 항계 내의 선박들의 주 통신시스템인 VHF 무선전화기는 항내에 입출항 중인 모든 선박들이 사용하기 때문에 통화 교신량의 폭주로 원활한 통신이 힘들어지고 또한 선박자동식별장치의 데이터 통신채널 또한 VHF이므로 class A 선박들도 동적 데이터의 누락현상이 발생하고 class B 선박들도 지역적으로 데이터 폭주현상이 발생하는 것으로 평가되고 있는 실정이다. 따라서 연안에서 운항하고 있는 모든 선박들을 모니터링하기 위해 소형선 및 심지어 어선들까지 선박자동식별장치의 설치를 유도하고 있는 실정이므로 통신채널의 폭주현상에 따른 데이터 누락현상은 더욱 심해질 것이다. 따라서 본 연구는 주파수공용방식(TRS: Trunk Radio System)의 통신시스템을 이용한 선박위치 자동발신장치에 적용방안을 제안하고 그 활용성을 입증하고자 한다.

• Journal of Ocean Engineering and Technology
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• v.13 no.1 s.31
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• pp.130-137
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• 1999

The wing-flap stabilizing system attached under the hull bottom of a small fishing vessel to prevent the capsize by controlling the roll motions has been developed. This paper describes the background of the system design together with the experimental results. The effectiveness of the system is proven by the towing tank tests with a 1/4 scale model, showing that the roll motions of the model are much reduced by the active flap control in multidirectional irregular waves forward speeds.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.61-62
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• 2001

현재 연근해 어선에는 정격하중 1∼2톤의 크레인이 주로 보급, 설치되고 있는데, 이들 어선에서 사용하는 크레인은 안정성이나 동적 특성에 관한 조사, 분석이 거의 없어 크레인을 이용한 어로작업시에 많은 위험이 수반되고 있다. 따라서, 연근해에서 사용되고 있는 크레인의 진동저감 대책과 안정적이고 효율적인 사용을 위해서는 크레인의 동적응답 특성에 대한 규명이 필요하고, 또한, 향후 어로 크레인의 사용을 활성화시켜 어로작업의 효율화와 노동력 절감을 모색하기 위한 연구가 절실히 요구된다. (중략)

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.38 no.3
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• pp.249-255
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• 2002

This paper describes on the extraction of ship's real-time movement information using a combination full-function ARPA radar and ECS system that displays radar images and an electronic chart together on a single PC screen. The radar target extractor(RTX) board, developed by Marine Electronics Corporation of Korea, receives radar video, trigger, antenna bearing pulse and heading pulse signals from a radar unit and processes these signals to extract target information. The target data extracted from each pulse repetition interval in DSPs of RTX that installed in 16 bit ISA slot of a IBM PC compatible computer is formatted into a series of radar target messages. These messages are then transmitted to the host PC and displayed on a single screen. The position data of target in range and azimuth direction are stored and used for determining the center of the distributed target by arithmetic averaging after the detection of the target end. In this system, the electronic chart or radar screens can be displayed separately or simulaneously and in radar mode all information of radar targets can be recorded and replayed In spite of a PC based radar system, all essential information required for safe and efficient navigation of ship can be provided.

• Journal of Navigation and Port Research
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• v.29 no.5 s.101
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• pp.383-388
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• 2005

To install a radar reflector on small ships, such as a small fishing vessel, a fishery buoy, and a barge ship for fishery, it is very important to develop the optimal system which may determine a proper installation location. For this, the response characteristics how waves have an effect on the small ships should be accurately analyzed. In this paper, we analyze the dynamic behaviors of small ships, which may be caused by irregular waves. To do this, we investigate how a barge ship responses to wavelength, water depth, and directions of incoming waves. The analyzed results shall be utilized to evaluate an effect on a radar cross section when we install an radar reflector on a barge ship for fishery and a small ship.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.171-171
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• 2022

해양사고는 매년 증가 추세이고 충돌사고 비율은 낮지만, 발생 시 대규모 피해로 있다. 특히, 3톤 미만 소형어선의 경우 바다네비게이션 서비스 등의 지능형해상교통서비스 관련 법규에서 제외되어 해양디지털화 및 해양사고의 사각지대에 놓여있다. 이에 따라, 본 연구에서는 3톤 미만의 소형선박의 환경에서 제공가능하도록 충돌예방에 기여할 수 있는 선박안전 충돌경보 이동형 단말장치 개발을 위하여 시제품을 개발하고, 소형선박 환경에서의 WAVE 기반 통신영역 실증 테스트를 수행함으로써 WAVE 통신기반 단말장치 활용 가능성을 확인하고 개선방안을 도출하였다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.9 no.2
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• pp.98-108
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• 2006

The vessels, already built and is operating in Korea, have the hull form of catamaran, with LOA(Length Over All) 15 m, LBP(Length Between Perpendiculars) 12 m, GT(Gross Tonnage) 9.77ton, Light Load Displacement 15.1ton. Korean Society of Ship Inspection & Technology, Chungnam National University, Inha University, Seoul National University and Advance Marine Tech co. ltd developed by cooperation it for fishing vessels. And it used FRP(Fiber Reinforced Plastics) for hull material and main engine of diesel $360ps{\times}2800rpm{\times}2sets$ with a water jet system. Based on these results, this paper describe small leisure fishing vessels with multi-hull, in relation to the project of CTYS(Regional Reserch Center for Transportation System of Yellow Sea Inha University) that aimed to development of trimaran hull form(LOA=17m, LBP=14m(Side Hull=6m), GT=9.77ton, Light Weight=11.2 ton).

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.647-652
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• 2002

The main object of Maritime Safety Network is to prevent Marine Accidents in advance and avoid the loss of live and property efficiently. Our country's Marine Safety Network was widely changed with its concerned rules and the operation methods through the complete operation of GMDSS system. Thus, compared with the past, maritime safety equipment and its systems were enforced, but the loss of lives from marine accidents tends to increase against the general expectation. 80 percent of the total marine accidents in Korea is caused by small fishing boats that are capsized immediately from accidents. To minimize the loss of lives they are to require the help of rescue. Lately imported GMDSS communication equipment is operated very fast automatically to issue the rescue and inform the distress, but most general small fishing boats are under 5 ton vessel and excluded from the administration of GMDSS system. In this paper is to propose the proper solution for the efficient improvement of maritime safety network suitable for the our practical circumstance.