• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.2
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• pp.153-159
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• 2016

Gwangyang traffic safety designated area is composed of 3 fairways (Deep water fairway, inbound fairway, and outbound fairway). However, inbound vessels can't use this passage because of Samyeo rock and artificial fishing banks in inbound route. The problem with the rocks and artificial fishing banks has been raised by ship navigators and authorities of the port. This research is about the safety evaluation and management plan of the passage, and we conducted maritime traffic simulation using a model based on a ship operator risks. As a result, assuming that future marine traffic volume is the same as the present, and if the ship operators use 3 fairways and not two, it showed risk reduction of 46.4 % (vessels over 50,000 DWT using DW route) and 57.1 % (vessels over 10,000 DWT using DW route). Also, in a traffic volume condition which is the same as the present, to induce vessels over 50,000 DWT to use DW route is effective in mitigating of risks. Meanwhile, in a condition which increased the traffic volume by 150 %, it is more effective to induce vessels to use DW route. This research is the result of analysis using the model based on ship operator risks, and not cost-effectiveness analysis on the removal of Samyeo rock and artifical fishing banks. This research is expected to be used on setting up the sea route and management plan (particularly, restriction on passing DW route).

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.132-134
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• 2012

우리 나라에서 해상 교통 및 선박의 통항 안전성의 평가를 위하여, 선박조종시뮬레이터 실험을 통해 얻어진 선박운동의 데이터와 조종자의 의견을 반영하여 검토하고 있는 것이 일반적인 수행 방법이다. 세부적인 기법으로는 선박의 해상시설물에 대한 접근도, 선체의 제어도 그리고 선박 조종자의 평가를 들 수 있다. 이 중에서 해양시설물에 대한 선박의 접근 및 선박의 제어도와 관련된 부분은 통계적으로 계산되어 그 기준이 명확한 측면이 있으나, 조종자의 의견에 의한 평가는 상대적으로 기준이 모호한 면이 있고 또한 조종자의 평가와 선박의 제어도와 관계에 대한 연구도 부족한 실정이다. 따라서 본 연구에서는 선박의 제어도와 조종자의 평가를 각각 기술적 운항만족도와 심리적 운항만족도로 정의하고, 그 관계를 알아 보기 위하여 퍼지 추론을 실시하였다. 이로부터 기술적 운항만족도와 심리적 운항만족도의 상관 관계를 정리하고, 그 관계가 높을수록 관련 평가의 신뢰성은 높을 것으로 생각하였다.

• Journal of Navigation and Port Research
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• v.26 no.1
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• pp.112-119
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• 2002

In accordance with the development plans of Jeju for international free city, Jeju new harbor will be constructed cosidering supporting Jeju city as an international tour city, safe arrival and departure at the terminal of 80.000G/T cruise ship. In this study, we used a full-mission ship handling simulator adopting 80.000G/T cruise ship manoeuvered at the planned Juju international cruise terminal. Five masters who have had a long experience of shop maneuvering ware called to carry out the simulations of which No. 1 , Np. 2, and No.4 scenario of simulation were tried twice, completed the total of 10 times and No.3 scenario of simulation once, reached at the total of 5 time. The marine traffic safety was assessed in terms of 1) the closest point of approach(CPA) to breakwater and quay in the vicinty and the probability of crossing fairway limit, 2)subjective evaluation such as the mental burden and the maneuvering disfficulty of shiphanders and 3) the opinions of shiphandlers. From th result of this simulation, we have a conclusion that the 80.000G/T cruise ship can be maneuvered safely at the planned terminal.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.6-7
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• 2017

무인선박의 출현 및 운항 시기가 도래하는 시점에서, 항해사들의 경험적, 정성적 방법으로 항로를 설정하던 기존의 방식이 아니라 정량적 항로 결정 방식 필요성이 제기된다. 본 연구에서는 위험물(HNS) 적재선의 해상교통사고 리스크 기반의 침로 설정을 통해 실시간 데이터 활용에 따라 변화 추정 및 인적 오류를 최소화하여 무인선박 운항 시 활용 가능한 항로 설정 기법을 제안하였다. 항로 주변의 정적 위험(Static Hazard)을 기반한 리스크 평가 방법을 제시하고, Contour map으로 시각화 통해 무인선박뿐 아니라 현존하는 선박에도 적용 가능하여, 사용자 결정에 따라 리스크 기반으로 침로 설정 통해 선박 운항 효율성 및 안전성 확보에 기여할 것으로 기대된다. 본 연구 내용을 토대로 정적 위험뿐 만아니라 선박을 포함한 동적 위험을 반영한 실시간 리스크 기반 항로 설정까지 확장하기 위한 연구가 요구된다.

• 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.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.2
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• pp.247-255
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• 2021

The Ulsan anchorage has not secured a sufficient area than the anchorage demand, and the criteria for objective evaluation are not clearly defined. In this study, a general formula to solve the problems of the current anchorage density and occupancy concept was derived, and new adequacy evaluation criteria were proposed. The proposed criteria were applied to the Ulsan E anchorage to evaluate the suitability of the anchorage. The anchorage density and occupancy of the E1 anchorage were 129 % and 122 %, respectively, showing that both evaluation techniques exceeded 100 %, requiring anchorage expansion according to the evaluation criteria. A plan to expand the anchorage was reviewed considering the traffic pattern and the distance from the pilot boarding point. Therefore, a plan to open 35˚ on a sector at the end of the Ulsan No. 1 fairway was developed, and its suitability was verified. Base on the verification results, there was a part of the overlap between the extended area and the traffic track on the south of the E3 anchorage, but the possibility of affecting the marine traffic was minimal. In addition, it was confirmed that anchorage adequacy was achieved.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.5-7
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• 2007

IMO MSC 에서 제안된 E-Navigation 개념은 전자정보통신기술에 기반한 선박과 육상간 해양정보의 수집, 통합, 교환, 표현, 분석 풍을 통해서 항행 안전과 효율을 높이고, 해양환경을 보호하는 항행서비스를 개선하는 것이다. E-Navigation 전략을 개발하고 E-Navigation 환경을 구축하는 과정에서 해상교통환경의 주체가 되는 관제센터와 운항 선박의 정보교환 연동 시뮬레이션은 E-Navigation 환경 구축에서 중요한 의의가 있다. 육상-선박간 연동 시뮬레이션을 통해서 E-Navigation의 다양한 정보 교환의 기술적 가치와 새로운 교통환경의 안전성과 효율성을 평가할 수 있다. 본 연구에서는 항만 관제 모의를 수행하는 VTS 시뮬레이터와 선박운항을 모의하는 선박운항 시뮬레이터를 통합 운영하여 고급의 교통 정보를 양방향으로 교환하고, 각 선박마다 차별화된 교통 정보를 제공받을 수 있는 방안을 마련하기 위한 E-Navigation 환경을 시뮬레이션하는 시스템을 연구하였다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.6
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• pp.775-782
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• 2021

The Myodo-Strait at Yeosu Port is normally used as a major vessel passage for dangerous cargo carriers that carry regular products of dangerous goods. Currently, the Myodo-Strait allows only single passage, and the speed of passage is also limited to 8 knots. As a result, demurrage at the wharf of hazardous goods are also on the rise. It is expected that the development of a number of dangerous commodity wharf in the future will increase the volume of vessel traffic and increase the number of vessels used in the project area. Therefore, it is urgent to improve the waterway in order to secure the safety of ships using the waterway and improve the demurrage. This study proposed an improvement plan for the waterway through the analysis of the marine environment of the waterway and the process of collecting opinions from users in the sea area. and it was finally proposed to expend the width of the strait to 300m and secure a depth of 9.50m through Guidelines of Port and Harbor Design review and ship handling simulation evaluation. In addition it was evaluated that the vessel traffic congestions at peak-time in the situation of solo passage was greatly improved from 71.01% to 47.3% even when it was allowed to ship's crossing passage, as a result of vessel traffic congestions evaluation. According to the proposed improvement plan, the safety of ships' passage in the project area can be secured, and the issue of demurrage was also considered to be improved.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.2
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• pp.188-196
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• 2023

Among marine accidents caused by bad weather, visibility restrictions caused by sea fog occurrence cause accidents such as ship strand and ship bottom damage, and at the same time involve casualties caused by accidents, which continue to occur every year. In addition, low visibility at sea is emerging as a social problem such as causing considerable inconvenience to islanders in using transportation as passenger ships are collectively delayed and controlled even if there are local differences between regions. Moreover, such measures are becoming more problematic as they cannot objectively quantify them due to regional deviations or different criteria for judging observations from person to person. Currently, the VTS of each port controls the operation of the ship if the visibility distance is less than 1km, and in this case, there is a limit to the evaluation of objective data collection to the extent that the visibility of sea fog depends on the visibility meter or visual observation. The government is building a marine weather signal sign and sea fog observation networks for sea fog detection and prediction as part of solving these obstacles to marine traffic safety, but the system for observing locally occurring sea fog is in a very insufficient practical situation. Accordingly, this paper examines domestic and foreign policy trends to solve social problems caused by low visibility at sea and provides basic data on the need for government support to ensure maritime traffic safety due to sea fog by factually investigating and analyzing social problems. Also, this aims to establish a more stable maritime traffic operation system by blocking marine safety risks that may ultimately arise from sea fog in advance.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.7
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• pp.828-835
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• 2023

Vessel traffic service operators (VTSOs) need to quickly and accurately analyze the maritime traffic situation in the vessel traffic service (VTS) area and provide information to the vessels. However, if traf ic increases rapidly, the workload of VTSOs increases, and they may not be able to provide adequate information. Therefore, it is essential to develop VTSO support technologies that can reduce their workload and provide consistent information. In this paper, we propose a model for automatically detecting abnormal vessels in the VTS area. The proposed model consists of a positional model and a contextual model and is specifically optimized for the traffic characteristics of the target area. The implemented model was tested by using real-world data collected at a test center (Daesan Port VTS). Our experiments confirmed that the model could automatically detect various abnormal situations, and the results were validated through expert evaluation.