• 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).

• Journal of the Korean Society of Marine Environment & Safety
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• v.30 no.1
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• pp.74-81
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• 2024

In the near future, autonomous ships, ships controlled by shore remote control centers, and ships operated by navigators will coexist and operate the sea together. In the advent of this situation, a method is required to evaluate the safety of the maritime traffic environment. Therefore, in this study, a plan to evaluate the safety of navigation through ship control simulation was proposed in a maritime environment, where ships directly controlled by navigators and autonomous ships coexisted, using autonomous operation technology. Own ship was designed to have autonomous operational functions by learning the MMG model based on the six-DOF motion with the PPO algorithm, an in-depth reinforcement learning technique. The target ship constructed maritime traffic modeling data based on the maritime traffic data of the sea area to be evaluated and designed autonomous operational functions to be implemented in a simulation space. A numerical model was established by collecting date on tide, wave, current, and wind from the maritime meteorological database. A maritime meteorology model was created based on this and designed to reproduce maritime meteorology on the simulator. Finally, the safety evaluation proposed a system that enabled the risk of collision through vessel traffic flow simulation in ship control simulation while maintaining the existing evaluation method.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.18-20
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• 2015

In ports of Korea, the marine traffic flow is congested due to a large number of vessels coming in and going out. In order to improve the safety and efficiency of these vessels, South Korea is operating with a Vessel Traffic System, which is monitoring its waters 24-7. However despite these efforts of the VTS (Vessel Traffic System) officers, marine accidents are occurring in their assigned districts and it is made a danger situation every 20minute. On this paper, we listened to Busan VHF channel for 3days and applied to collision risk model. With collision risk model, We deducted a moment which advise or recommend to vessel. We suggested a collision risk model as VTSO support system.

• Journal of Navigation and Port Research
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• v.30 no.8 s.114
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• pp.617-622
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• 2006

Gamcheon Harbor was developed to cope with increased freight demand of Busan port and supplement function of the north port. Because container wharf is opened to 1997 as well as general wharf, present maximum 50,000DWT class containerships have been incoming and outgoing. However, In Gamcheon port, small size ships such as fishing boats, miscellaneous boats account for 50 percent of the traffic and a public marine products wholesale market that is building on the north wharf will open in 2008. Therefore, it needs to grasp future year traffic volume before establishing operation plan for port management. Also, analysis on crossing situation risk is required because the breakwater entrance in Gamcheon Harbor is narrow and the crossed passing of ship is ever-present at breakwater front. Thus the traffic volume in the future was presumed and quantitative analysis was achieved on crossing situation though simulations with the traffic volume.

• Journal of the Korean Society of Marine Environment & Safety
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• v.14 no.1
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• pp.65-69
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• 2008

Now it is said that the insufficency of the designated anchorage for ships in approaching waters of Wan-do port is the one of reasons for marine safety accidents, when vessels encounter rough weather near the port. This research examined geographical feature in approaching areas of Wan-do port and suggested appropriate weather anchorage. The situations of fishing nets areas were investigated Marine vessel traffic flow was also examined. Through these research the optimal anchorage was suggested in the approaching waters of Wan-do port.

• Proceedings of KOSOMES biannual meeting
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• 2007.05a
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• pp.181-185
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• 2007

Now it is said that the insufficency of the designated anchorage for ships in approaching waters of Wan-do port is one of reasons for marine safety accidents, when they encounter rough weather near the port. This research examined geographical feature in approaching areas of Wan-do port and suggested appropriate mate weather anchorage. The situations of fishing nets were investigated Marine vessel traffic flow was also examined The optimal anchorage was suggested considering these results.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.6
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• pp.660-670
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• 2016

This study expresses the necessity of recognizing Pyeongtaek Port as a specific traffic safety area to ensure the safety of the vessels that navigate there using quantitative data. The number of foggy days, pilotage distance, the number of large vessels and the number of fishing vessels that traveled between Pyeongtaek Port and 6 ports chosen as comparative study objects were compared and analyzed. The results showed that Pyeongtaek Port was more frequently affected by restricted visibility. With these perverse conditions, Pyeongtaek Port has a longer pilotage distance than Busan, Busan Newport, Ulsan or Pohang Ports by as much as 3.5-6 times. Especially from May to July, when fisheries were most functional, large vessels were required to navigate in an opposite direction to avoid 35 fishing vessels that were observed, creating an increased possibility for collisions among vessels. Therefore, the navigational safety of Pyeongtaek Port should be further secured by defining the approaching waters as specific traffic safety areas, giving large vessels legal priority over fishing vessels.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.197-199
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• 2012

우리나라 첫 연안VTS인 진도 연안VTS의 운영 성과를 분석하고, 운영 사례를 조사하여 연안VTS기능에 관하여 실증적으로 분석하였다. 연안VTS는 관제구역이 넓어 해상교통 특색이 장소마다 상이하며, 집중 관제를 필요로 하는 곳이 많았고, 통항선박 중어선과 같은 비관제 대상 선박이 다수를 차지하여 이들의 관제가 중요한 것으로 조사되었다. 그리고 선박 운항자의 집중도가 항내보다는 떨어지므로 인적과실에 의한 사고 개연성이 높은 것으로 분석되었다. 연안VTS는 항만VTS와 같이 정보제공, 항행지원, 교통관리의 역할을 주로 하고 있지만, 수색구조 지원, 해상 보안, 해상치안 업무, 해양오염 대응, 비관제 대상 선박 업무 및 수상레저 안전관리 등의 기능을 강화되는 것으로 나타났다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.352-354
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• 2012

'해사안전법'상 해상교통안전진단 대상사업인 "부산항 신항 선박급유 및 유류중계기지 건설사업"은 신항만건설기본계획에 반영('09.4)되어 추진 중, 항만이용자 및 전문가들이 선박의 통항안전성 등에 대한 문제를 지속적으로 제기함에 따라 해역이용자들과 수차례 검토회의 및 토론회 등을 개최하여 동 시설에 대한 해상교통안전성 확보방안에 어떤 문제점과 개선방안이 있는지를 검토해왔다. 본 연구에서는 동 사업에 대한 해상교통안전진단 사전검토 사례를 통해 사전 의견수렴의 중요성을 파악하고, 논의과정에서 도출된 문제점(또는 미비점)과 개선방안 및 관계기관간 역할을 고찰하여 제도개선 사항을 도출하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.67-68
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• 2016

해상교통환경평가는 선박 간 항행상황의 위험도를 정량화하여 나타냄으로써 선박의 안전운항을 효과적으로 지원하는 역할을 한다. 대표적인 해상교통환경평가모델로는 ES(Environmental Stress model)와 CR(Collision Risk)모델이 있다. 이러한 모델을 살펴보면, 각각의 평가지수를 이용하여 항행상황의 위험도를 정량화하며, 선박 간 조우관계를 기반으로 평가요소를 구성함을 알 수 있다. 이번 연구에서는 선박 간 조우관계를 포함한 항행상황의 위험도에 영향을 줄 것으로 기대되는 다양한 요소를 고려한 평가지수의 타당성을 살펴보고자 한다. 이를 위하여, AIS data를 이용하여 해상교통환경을 재현하고 분석하였으며, 동일한 항행상황을 ES, CR과 제안한 모델을 이용하여 위험도 평가를 실시하였다. 그 결과를 비교하여 제시함으로써 본 모델이 해상교통환경모델로서 항만 내 통항 안전성 평가에 적용 가능성을 평가하였다.