• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.565-567
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• 2012

최근 목포 해상교통관제(VTS)구역 내 만곡부 항로상에 연륙교가 건설됨에 따라 연륙교를 통과하는 선박들의 충돌사고 위험성이 높아질 개연성이 커졌다. 해당 수역에서의 선박교차와 관련된 선박교통의 분석을 집중적으로 실시함으로써 향후 해상교통관제 업무와 관련하여 주의하여야 할 사항 및 대책들을 제시하였다. 특히 교차빈도가 높은 여객선과 예부선 간의 C PA를 분석함으로써 해상교통사고의 위험을 줄이기 위해 확보되어야 할 최소안전거리에 대해서 중점적으로 검토하였다.

• Journal of Navigation and Port Research
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• v.28 no.1
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• pp.9-16
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• 2004

The purpose of this study is to examine the algorithm of ship collision avoidance system and to improve its performance. The study on the algorithm of ship collision avoidance system have been carried out by many researchers. We can divide the study according to the adopted theory into two category such as 'collision risk calculation method' and 'risk area method'. It is not so difficult to find heir merit and demerit in the respective method. This study suggested newly modified model, which can overcome a limit in the two method. The suggested model is based on collision risk calculation method and suggests how to solve the threshold value problem, that is, one of the unsolved issues in collision risk calculation method. To solve that problem this study proposed new system under which the users can select appropriate threshold value according to environments such as traffic situations and weathers conditions. Simulation results of new model is schematized using 'risk area method'to examine the relationships between the two method. In addition, in case of 'collision risk method', when TCPA and DCPA are used to determine collision risk, a problem happens, that is, two ships become too close in their stem area, therefore, partial function of 'risk area method'is adopted to solve the problem in suggested model.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.2
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• pp.238-246
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• 2021

Collision of small vessels such as fishing boats cause great personal injury. Prior to this study, the collision prevention algorithm was developed to assess the collision risk and make the collision alarm. However, a service provided for safety, such as a collision warning, not only prevents risks, but also requires a certain degree of user satisfaction to function effectively. In this study, the collision prevention algorithm for small vessels was improved to be more practical, and the effects of the improvement were confirmed by applying the algorithm. A survey conducted on the users of the collision warning service confirmed the user requirements for improving the accuracy of the collision warning system and reducing the volume and number of alarms. Accordingly, the algorithm was improved for user satisfaction, and the actual vessel experiment was performed applying the improved algorithm in an actual maritime environment. As a result, the frequency of alarm occurrence decreased compared to former algorithm, but the alarm was relatively steadily generated in dangerous situations. It was analyzed that the accuracy and practicality of the collision alarm were improved. If the practicality and reliability of the improved algorithm are verified in the further study, it will be able to effectively contribute to the prevention of collisions of small vessels.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2003.05a
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• pp.81-86
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• 2003

The studies on automatic ship collision avoidance system, which have been carried out last 10 years, are facing on new situation due to newly developed high technology such as computer and other information system. It was almost impossible to make it used in real navigation 3-4 years ago because of the absence of the tool to get other ship's information, however recently developed technology suggests new possibility. This study is carried out to develop the algorithm of automatic ship collision support system. The NOMOTO ship's mathematic model is adopted in simulation for its simplicity. The fuzzy reason rules are used for course-keeping system and for the calculation of Collision Risk using TCPA/DCPA. Moreover‘encounter type’ between two ships is analyzed based on Regulations for Preventing Collisions at Sea and collision avoidance action is suggested, Some situations are simulated to verity the developed algorithm and appropriate avoidance action is shown in the simulation.

• Journal of Navigation and Port Research
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• v.27 no.4
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• pp.375-381
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• 2003

The studies on automatic ship collision avoidance system, which have been carried out last 10 years, are facing on new situation due to newly developed high technology such as computer and other information system. It was almost impossible to make it used in real navigation 3-4 years ago because of the absence of the tool to get other ship's information, however recently developed technology suggests new possibility. This study is carried out to develop the algorithm of automatic ship collision support system. The NOMOTO ship's mathematic model is adopted in simulation for its simplicity. The fuzzy reason rules are used for course-keeping system and for the calculation of Collision Risk using TCPA/DCPA. Moreover ‘encounter type’ between two ships is analyzed based on Regulations for Preventing Collisions at Sea and collision avoidance action is suggested. Some situations are simulated to verity the developed algorithm and appropriate avoidance action is shown in the simulation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.138-138
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• 2020

전세계적으로 자율운항선박 기술개발이 활발하게 이루어지고 있으며, IMO(국제해사기구)에서는 자율운항선박 도입을 위한 제도적 측면에서 검토 중이다. 우리나라도 해수부-산업부 공동으로 자율운항선박 기술개발사업을 진행 중이며, 2025년까지 자율화등급 3수준의 기술개발을 목표로 한다. 본 연구는 자율운항선박 항해에 기초가 될 충돌회피 시점을 도출하고자 한다. 이를 위해 우리나라 연안의 해상교통조사 자료를 이용하여 선박운항자의 피항시점(CPA, TCPA, 위험도, 이격거리, 선수방향차이 등)을 파악하고자 한다. 피항시점은 자율운항시스템의 기초학습자료로 이용할 수 있을 것으로 예상된다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.133-135
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• 2020

현재 자율운항선박의 성공적 달성을 위해 다양한 연구개발이 진행 중이며 이와 관련하여 자율운항선박의 안전항해 지원을 위해 자율운항 지원 서비스와 해양사고 대응 서비스가 개발되고 있다. 자율운항 지원 서비스는 전자해도표시시스템(ECDIS, Electronic Chart Display and Information System)에서 수립하는 항로 계획 정보를 육상 운항조정상황실에 전송하여 충돌 위험 예측 후 유용한 정보를 자율운항선박에게 제공하는 서비스이다. 이 서비스를 통해 타 선박과 자율운항선박간의 조우 지점과 타 선박의 사전 변침정보를 미리 알 수 있기 때문에 충돌 예측 정보로써 활용할 수 있다. 해양사고 대응 서비스는 현재 사람에 의존적인 해양사고 상황인식 및 해양사고 대응기관에 전파하는 것을 자동으로 상황을 인식하고 사고 대응하는 서비스이다. 이 서비스를 통해 사고 단계별 유용한 정보를 사고선박 및 주변 해양사고 대응기관에 정보를 제공함으로써 추가적인 해양사고 방지와 즉각 대응이 가능하다. 본 연구에서는 2가지 서비스를 성공적으로 제공하기 위해 시스템의 요구사항을 분석하고 시스템 아키텍처를 설계하였다.

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.113-113
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• 2017

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.06a
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• pp.290-293
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• 2014

하인리히 법칙에 따르면, 하나의 대형사고는 다수의 경미한 사고나 수많은 근접한 위험상황이 발생한 위치에서 발생할 확률이 높다. 해상교통상황에서도 양 선박이 충돌 위험이 있는 상황, 즉 근접사고 상황은 해상교통관련 대형 사고를 예방하는 관점에서 중요하다. 하지만, 아직까지 이러한 근접사고 자료는 VTS데이터 접근에 어려움, 관련 전문 기법 부족 등으로 수집 분석하는데 어려움이 있었다. 이에 본 연구에서는 해상교통 근접사고를 조우하는 선박간에 시공간적으로 충돌에 근접한 상황들이 발생하여 충돌의 위험이 일정한 값 이상으로 높아진 상황으로 정의하고, 2013년도 완도VTS 관제해역 해상교통 항적데이터를 적용하여 근접사고 통계를 분석하였다.

• Journal of the Korean Institute of Intelligent Systems
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• v.22 no.3
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• pp.373-378
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• 2012

In terms of the maritime accident prevention, risk analysis at targeted warterways is important for planning safety waterways. This paper analyzes the maritime accidents probability in the Mokpo waterways, South Korea, based on the IWRAP(IALA Waterway Risk Assessment) of the quantitative accident probability tool. Vessel collision probability cate is calculated by vessels meeting direction, using IWRAP. This paper contribute to advance improvement of vessel traffic service by VTS sector providing vessel fairway risk data.