• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.38-39
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• 2019

Optimal route planning is the route planning to minimize voyage time or fuel consumption in a given ocean environment. Unlike the previous studies on weather routing, this study proposes an optimization method for the route planning to avoid the grounding risk in the coast. The route way-points were searched using Dijkstra algorithm, and then the optimization was performed to minimize fuel consumption by setting the optimization design parameter to the engine rpm. To set the engine rpm, a method to use the fixed rpm from the departure point to the destination point, and a method to use the rpm for each section by dividing the route were used. The ocean environmental factors considered for route planning were wind, wave, and current, and the depth information was utilized to compute grounding risk. The proposed method was applied to the ship passing between Mokpo and Jeju, and then it was confirmed that fuel consumption was reduced by comparing the optimum route and the past navigated route.

• Journal of Korea Fishing Vessel Association
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• v.54
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• pp.53-57
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• 1993

• Journal of Korea Fishing Vessel Association
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• v.53
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• pp.42-46
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• 1993

• Bulletin of the Society of Naval Architects of Korea
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• v.47 no.4
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• pp.7-10
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• 2010

• Journal of the Society of Naval Architects of Korea
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• v.56 no.3
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• pp.263-272
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• 2019

The aim of this study is to develop a rapid calculation technique of the residual strength in order to prevent sequential events under grounding accidents. Very Large Crude-Oil Carrier (VLCC), Suezmax, and Aframax double hull oil tankers carrying large quantities of crude oil were selected for target structures. The rock geometries are chosen from the published regulation by Marine Pollution Treaty (MARPOL) of the International Maritime Organization (IMO). Oceanic rocks as the most frequently encountered obstruction with ships are applied in this work. Damage condition was predicted using ALPS/HULL program based on grounding scenario with selected parameters, i.e. depth of penetration, damage location and tanker type. The results of the scenarios are quantified to form an empirical formula which can evaluate the residual strength. The proposed formula is validated by applying a series of random grounding scenarios.

• Journal of Navigation and Port Research
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• v.28 no.6
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• pp.481-489
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• 2004

Ship collisions and grounding continue to occur regardless of continuous efforts to prevent such accidents. With the increasing demand for safety at sea and for protection of the environment, it is of crucial importance to be able to reduce the probability of accidents, assess their consequences and ultimately minimize or prevent potential damages to the ships and the marine environment. Numerical simulations for actual collision problem are conducted with a special attention with respect to finite element size, fracture criteria and material properties, which require a careful consideration to improve the accuracy. A parametric analysis varying colliding speed, angle, design loading condition is conducted using nonlinear finite element analysis method for 46,00 dwt Product/chemical carrier. The relationship between the absorbed energy and indentation are derived quantitatively using the insights observed from this study, and a novel design concept for assessing the anti-collision performance are proposed.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.556-561
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• 2003

선박에 의한 해난사고의 대부분을 차지하고 있는 충돌과 좌초를 예방하고 안전항행환경을 확보하기 위해서는 선박들의 교통량 정보 및 위치정보, 해상환경정보를 얻지 않으면 안 된다. 본 연구에서는 인공위성데이터를 통해 얻어진 선박정보를 추출하는 방법에 대해서 조사하고, 다시 얻어진 선박정보를 이용해서 장래위치에 있어서의 해상교통환경 시뮬레이션을 했다. 즉, 장래 해상교통상황을 정량화 된 값으로 표현하여 자동차용 교통신호와 비슷한 선박들의 교통제어신호를 제공함으로써 해상교통안전을 확보할 수 있는 시스템의 기초적 연구결과를 제시했다.

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.109-109
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• 2017

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.10a
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• pp.182-185
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• 2010

VTS관제구역 안에서 항행 중인 선박이 개항을 입출항하거나 지정된 통항분리수역을 항행하면서 규정된 항법을 준수하지 아니하고 있으며, 이로 인해 해양사고(좌초 및 충돌사고)가 발생하고 있다. 이에 사고사례를 통해 사고당시 VTS관제사가 취한 조치와 향후 해양사고예방을 위한 적절한 VTS관제에 대하여 의견을 제시하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.477-479
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• 2013

지금까지 해양사고 관련 조사보고서와 연구결과를 살펴보면 선박승무원의 피로가 업무수행능력에 밀접하게 영향을 미쳐서 인간과실을 유발하게하고 결국 각종 해양사고가 발생한다는 사실을 확인할 수 있다. 본 논문에서는 해양사고와 선박승무원의 피로도와 인과관계를 파악하고 분석하기위한 국내외 관련 연구동향 및 그 결과들에 대한 고찰을 하고자 하였다. 이를 기반으로 향후 선박승무원의 피로도를 관리하고 완하할 수 있는 체계적이고 합리적인 방안을 마련하고 최종적으로 충돌, 좌초 등과 같은 각종 해양사고를 예방하는데 기여하고자 한다.