• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.96-98
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• 2014

최근 지구온난화로 인하여 북극의 해빙이 감소하고 있고, 이로 인하여 새로운 북극항로와 자원개발에 관심이 국제적으로 증폭되고 있고, 우리나라의 경우 북극 옵서버 자격을 취득하고 범정부 차원의 북극정책기본계획을 수립하여 북극자원 개발과 북극항로 개척에 노력하고 있다. 아울러 정부기관을 비롯한 대학교, 연구기관 및 관련 산업계에서도 북극해역의 효과적인 활용에 필요한 기초연구와 다양한 개발 프로젝트를 수립하여 추진하고 있고, 이를 위하여 화물선, 어선, 자원 및 환경탐사선 등이 북극해역 항해하고 있으나 북극해역에 대한 이용은 최근에야 부각되었기 때문에 이용자들이 이용할 수 있는 북극해역의 기상과 같은 해양환경정보는 특정 기관에만 의존하고 있는 실정이다. 이 연구는 북극의 항로와 자원개발 등에 관심이 있는 기관들이 필요로 하는 북극해 기상환경정보에 대한 현황과 필요범위 등을 분석하고 이들 정보를 제공하는데 필요한 정책방안을 수립하는 것을 목적으로 하고 있다.

• Journal of the Korean Society of Mechanical Technology
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• v.13 no.4
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• pp.63-69
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• 2011

Hull forms for catamaran type small fishing boat powered by electric motor are newly developed by experimental approaches. Model tests for two hull forms having different length are made at circulating water channel. Resistance performance and wave patterns are compared to carry out an analysis of the effect of extension of main body. The results show that the extension of main body can give better resistance performance above a certain velocity.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.77-78
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• 2019

인천시는 2017년 12월에 발생한 진두항 낚시어선 충돌사고 등 선박에서 발생하는 해양사고를 예방하기 위해 선박충돌경고, 해상안전정보 제공, 실시간 자동 입출항 관리, 해상 e-Call 서비스 등을 제공하는 선박안전 실증사업을 추진하고 있다. 정확화고 표준화된 서비스를 제공하기 위해 서비스에 대한 명확한 정의가 필요하며, 이러한 서비스 정의서 개발을 통해 향후 다양한 서비스 설계를 위한 기틀을 마련할 수 있다. 본 연구에서는 선박안전 실증사업 서비스 정의서를 개발하기 위해 대상이 되는 중소형선박 운항자 및 유관기관 종사자에 대한 요구사항 분석을 실시하였다. 요구사항 분석을 통해 도출된 사항을 바탕으로 서비스 정의서 개발 및 적용할 경우, 보다 정확하고 효율적인 선박안전운행 시스템이 구축 될 것으로 기대된다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.55-56
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• 2022

현재 해상교통 분야에서는 국제안전관리규약(ISM Code)과 내항선 안전관리체계 등을 통해 해양사고를 저감을 위한 다양한 정책을 추진하고 있으나, 주기적으로 발생하는 대형사고와 잦은 소형어선 인명사고로 인해 타 운송수단에 비해 위험도 높은 것으로 인식되고 있다. 최근 안전분야의 최대 이슈는 2022년 1월부터 시행 중인 "중대재해기업처벌법"이며, 해운업 분야에서는 선박안전관리사 제도 도입 문제와 안전관리의 디지털화 등이 주요 이슈로 떠오르고 있다. 본 발표에서는 최근 안전관리 현황과 주요 이슈들을 살펴보고, 2000년대 들어와 관심을 받고 있고 타 분야에서는 적용이 활발한 레질리언스 안전(Safety II) 개념을 적용한 시스템적 안전관리를 소개하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.1
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• pp.59-68
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• 2003

It's about time we had to think an alternative to recover our insufficient fishery market caused by IMF locally as well as the fishery agreement on Japan and China. It's essencial that we have to build up the foundation of information-oriented fishery market In order to improve the infrastructure of the market like developed countries. In this paper We present digital data communication network to exchange information for fishery and safety between fishing ship and coast station in cheeper communication fee using SSB(Sing Side Band) in HF(High Frequency) band.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.288-295
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• 2002

It's about time we had to think an alternative to recover our insufficient fishery market caused by IMF locally as well as the fishery agreement on Japan and China. It's essential that we have to build up the foundation of information-oriented fishery market In order to improve the infrustructure of the market like developed countries. In this paper We present digital data communication network to exchange information for fishery and safety between fishing ship and coast station in cheeper communication fee using SSB(Sing Side Band) in HF(High Frequency) band.

• The Transactions of the Korean Institute of Power Electronics
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• v.22 no.4
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• pp.353-359
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• 2017

To take advantage of electric propulsion, several large vessel kinds, namely, cruise vessels, icebreakers, drill ships, and warships, have been generally designed with Integrated Power System (IPS). Although most of these vessels have adopted AC distribution IPS, DC distribution IPS ships have recently emerged as a new promising technology thanks to the availability of the products related to the DC distribution system, in which the system's major advantages over AC distribution are reduced weight and fuel consumption. This paper presents the comparison results of a 10-t class fishing boat for the AC distribution and DC distribution cases. By replacing AC distribution system with DC distribution, 31-41% reduction in the weight of the electrical equipment weight and 20-25% reduction in the fuel consumption are expected.

• Journal of the Korean Magnetics Society
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• v.24 no.6
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• pp.197-201
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• 2014

As the importance of rare metal is increasing globally, Japan introduced the concept of Strategic Elements in 2004, and started Strategic Elements Project in 2007. The Goal of this project run by MEXT (Ministry of Education, Culture, Sports, Science and Technology) is to develop high-function materials and components that do not use rare or harmful elements by studying the role and characteristics of the elements that compose materials and components and decide their functions and characteristics. In September 2010, Japanese coast guard arrested a Chinese fishing boat near Senkaku Islands (Diaoyudao Islands by China), which escalated to the territory issue and eventually a big diplomatic and economic conflict. In order to put pressure on Japanese Government, China used an economic option, which is the ban of rare earth export to Japan. This incident doubled Japan's motivation to develop Strategic Elements and put more efforts into this Project. MEXT set the following three research areas in February 2012: Study of alternative materials using sufficient and harmless elements, Study of applications for the high-functions of Strategic Elements, Study of practical design for components using Strategic Elements. Through a course of gathering the opinion of professionals, MEXT settled down with the following 4 research and study areas for the Strategic Elements Project in June 2012. 1. Magnetic materials to replace Dy, Nd. 2. Catalyst/Battery materials to replace Pt, Rh/Li, Co. 3. Electronic materials to replace In, Ta. 4. Structural materials to replace Nb, Mo. This paper deals with the first area and reviews the results of the research and study as of now.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.7
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• pp.841-850
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• 2019

The Korean government has designated speed-limit zones and speed limits in 19 ports and 3 routes to ensure safe navigation and transportation. However, the speed limit differs from port to port, no practical means of management exist. This often leads to violation of the speed limit. Additionally, ship collisions due to human error continue to occur. First, the study analyzed marine accidents that occurred at trade ports and fairways. The result of the analysis revealed the occurrence of 1344 accidents (average 269 cases per year) from 2014 to 2018. Five hundred sixty three accidents involved fishing boats, whereas, merchant vessels were involved in 508 cases. Second, the efficacy of the application of voice and message warnings to GPS plotters and electronic chart display and information system (ECDIS) was reviewed, and these were proposed as measures to inform vessel operators of the hazards of speed limit violation. Third, experts' opinions from relevant agencies and navigation system manufacturers were consulted and it was found that the proposed warning function was technically implementable. The findings are expected to help reduce human error among ship operators and establish a Korean e-navigation system.

• Journal of the Society of Naval Architects of Korea
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• v.32 no.4
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• pp.27-37
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• 1995

A performance index is very important and indispensable to the evaluation of automatic steering system of ships in open sea from the viewpoint of energy saving. In this paper, we derive the performance index of automatic steering system from the concept of energy loss of propulsive power. The index is found to consist of three terms, energy loss due to elongation of sailing distance, energy loss due to steering, and energy loss due to yawing motion. We also provide two kinds of calculation method on the performance index ; frequency response analysis and digital simulation. The numerical calculations are carried out for an ore carrier and a fishing boat by both methods. The frequency response analysis is found to be useful if the system is linear and the disturbance on ship is not large. If the system is nonlinear or the disturbance is excessive, the method of digital simulation has to be applied for the accurate evaluation of the performance index. Further investigations into the effects of nonlinear elements such as weather adjuster, power unit etc. on the performance index, will be dealt with in another paper.