• Journal of the Society of Naval Architects of Korea
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• v.42 no.1 s.139
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• pp.57-63
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• 2005

This paper introduces basic research of optimum routing assessment system as voyage support purpose which can obtain safe and efficient route. In view point of safety, the prediction of ship motion should be evaluated in the condition of rough weather This part includes general seakeeping estimation based on 3 dimensional panel method and parametric roil prediction. For increasing voyage efficiency, ETA(Estimated Time of Arrival) and fuel consumption should be calculated considering speed reduction and power increase due to wave effects based on added resistance calculation and ship performance characteristics. Basically, the weather forecast is assumed to be prepared previously to operate this system. The idea of these factors in this system will be helpful to escape from dangerous voyage situation by wave conditions and to make optimum route planning based on ETA and fuel consumption.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.06a
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• pp.41-42
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• 2014

최근 우리나라에서는 새로운 항만설계 혹은 변경 등을 함에 있어 해상교통안전진단을 우선적으로 실시하여 해상교통의 안전을 도모하고 있다. 이 해상교통안전진단은 자연환경 및 해상교통조사, 선박조종시뮬레이션, 해상교통류 시뮬레이션, 계류안전성, 그리고 안전대책 등으로 구성되어 있다. 그 중 선박조종과 관련된 선박조종시뮬레이션이 아주 중요하다. 이것은 해당 항만에서 선박 조종을 담당하는 도선사 혹은 선장들에게 직접적인 관련이 있기 때문이다. 선박조종시뮬레이션에서 근접도 평가는 항로 혹은 접이안 조선의 안전도를 평가하는 중요한 요소이다. 그러나 근접도 평가는 시뮬레이션의 횟수를 얼마 이상으로 할 때 제대로 된 평가를 할 수 있는가 하는 점은 밝혀져 있지 않다. 중심극한정리에 따르면 30회 이상이면 표본 집단은 정규분포를

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.06a
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• pp.81-83
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• 2014

In recent years, owing to the irregular weather changes in the sailing vessels are needed for marine meteorological environmental counter measures. Marine meteorological monitoring system, information about these marine weather environments in real time around the coast by collecting a provides real time shipping and marine transportation safety is a system for. .. Long marine facilities marine observation sensors cover the routes developed by installing marine meteorological monitoring system, build management, and vessel safety is giving much help to navigate. The further development of the marine meteorological monitoring system analyzes the situation both at home and abroad, in order to study the safety of the vessel in navigable and marine accidents because the prevention and optimal marine meteorological monitoring system regarding the future development plan for discussion.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.299-300
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• 2022

4차 산업혁명으로 자율화·지능화됨에 따라 육·해상의 교통수단에 ICT 기술을 활용한 자율운행차 자율운항선박 등 신기술 및 서비스 개발이 점차 확대되고 있다. 본 연구에서는 해상분야의 자율운항선박 자율주행에 필요한 기술 도출을 위한 방법으로 육상분야의 자율주행차량의 핵심기술인 센서기술과 AI기술에 대해 알아보고 비교 분석하고자 한다. 자율주행차 주행을 위한 기술개발은 센서와 정밀도로정보(지도) 2트랙으로 개발이 진행되고 있으나, 최근 센서 오류 등으로 인한 사고발생이 잦아 정밀도로정보(지도) 중요성이 증가하고 있어 정밀도로 정보 구축을 서두르고 있다. 반면 자율운항선박의 경우 충돌회피 기술, 최적항로 개발, 정보보안 등 기술개발이 이루어지고 있으나 AI용 수로정보에 한 대비는 진행되고 있지 않고 있다. 따라서, 자율운항선박의 안전한 자율주행을 위한 방법으로 AI 알고리즘 연산과정에서 기계적으로 이용 가능하고 목적에 적합한 수로정보 구축이 필요하며 우리나라 선박의 안전운항을 위해 국가차원에서 수로정보 수집 및 생산을 담당해야 하므로 국가에서 주도하에 연구개발이 진행되어야 할 것이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.263-266
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• 2017

Numerous maritime safety technologies and systems are being developed to support safe navigation at Sea. e-Navigation is a representative system for maritime safety. It is being developed to maximize the ships safety by applying most maritime safety technologies. The e-Navigation system is being developed by the International Maritime Organization (IMO) with the aim of introducing it by 2019. South Korea has already recognized the importance of maritime safety support technology and is actively introducing e-Navigation. Korean e-Navigation is being designed to provide diverse functions for maritime safety, such as providing an optimal safe route, risk analysis, and weather information. Service modules that provide e-Navigation's each function use different types of data that are difficult to configure as a single database. In this paper, we analyze the data needed for Korean e-Navigation, the data service system structure and types that can effectively support it.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.366-367
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• 2018

최근 해양사고를 예방하기 위한 선박 모니터링, 최적항로 선정, 해사안전정보 제공 등과 같은 서비스에 대한 요구가 증가됨에 따라 선박 간 혹은 선박과 육상 간 데이터 통신의 중요성이 대두되고 있다. 그러나, 기존 해상 환경에서의 통신은 위성을 제외하고는 VHF/MF/HF 등의 지상파 기반 시스템에 의존하여 왔으며, 낮은 전송 속도로 인해 신규 서비스의 높은 통신속도 요구 보장에 한계가 있다. 따라서, 해상 환경에서 고속 통신 서비스를 제공하기 위해 WiMAX, LTE 등과 같은 육상 통신시스템을 해상으로 확대하고, 통신 커버리지 확장을 위해 이기종 네트워크 간 핸드오버 및 다중홉 네트워크를 구성하려는 많은 연구가 수행되고 있다. 본 논문에서는 기존 문헌에서 제안하는 해상 서비스들의 요구사항을 식별하고 이를 지원하기 위한 해상무선통신망 기술들을 통신 성능 관점에서 비교하여 초고속해상무선통신망 구축의 기초 요구자료로 활용하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.274-276
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• 2017

Korean e-Navigation is a system that introduced to reduce maritime accidents. In order to reduce marine accidents, Korean e-Navigation provides the following services-"Vulnerable Vessel Monitoring", "Vulnerable Vessel support & monitoring", "Optimal safety route", "ENC Streaming for Small Vessel", "Tug & Barge Support", "Maritime Safety Information Providing". Each Service is a system separated into finctional units and integrated into Korean e-Navigation. Korean e-Navigation is introducing data middleware to integrate each service and the DDS(Data Distribution Service) is judged to be effective. Thus, this paper analyzed the characteristics of DDS middleware types suitable for each service of e-Navigation.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.7
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• pp.870-874
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• 2018

In the worst maritime accidents, people should abandon ship, but ship structures are narrow and complex and operation takes place on rough seas, so escape is not easy. In particular, passengers on cruise ships are untrained and varied, making evacuation prospects worse. In such a case, the evacuation management of the crew plays a very important role. If a rescuer enters a ship at distress and conducts rescue activities, which zones represent the most effective entry should be examined. Generally, crew and rescuers take the shortest route, but if an accident occurs along the shortest route, it is necessary to select the second-best alternative. To solve this situation, this study aims to calculate evacuation routes using Q-Learning of Reinforcement Learning, which is a machine learning technique. Reinforcement learning is one of the most important functions of artificial intelligence and is currently used in many fields. Most evacuation analysis programs developed so far use the shortest path search method. For this reason, this study explored optimal paths using reinforcement learning. In the future, machine learning techniques will be applicable to various marine-related industries for such purposes as the selection of optimal routes for autonomous vessels and risk avoidance.

• Journal of the Korean Society of Marine Environment & Safety
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• v.21 no.2
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• pp.179-187
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• 2015

The purpose of this study is to identify the aspect that the traffic distribution function changes, according to the direction of the datum line and the horizontal and vertical positions of the datum point applied when it is calculated. Targeting routes at the entrance of Mokpo Harbor, this study tested using AIS survey data of January 2013 the effects of the three variables-direction of the datum line(${\theta}$), horizontal position($\mathfrak{L}_H$) and vertical position($\mathfrak{L}_V$) on mean ($\bar{x}$) and standard deviation (${\delta}$). The test result showed that $\bar{x}$ and ${\delta}$ were changed according to the change of ${\theta}$, because the extracted sample data were changed according to ${\theta}$; and the changes of $\bar{x}$ and ${\delta}$ according to ${\theta}$ were drawn as the relation of the sine function' sum. In addition, it was found that setting up ${\theta}$ that the change value of ${\delta}$ becomes the least as the direction of the datum line was valid, to determine the optimum passage distribution function on complex waters with multiple branches of route. The result of this study is expected to be used as basic data to understand maritime traffic flow based on more quantified data of normal distribution and make decisions related to maritime traffic safety management.

• Journal of Advanced Marine Engineering and Technology
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• v.34 no.4
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• pp.532-539
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• 2010

The high tech marine transportation infrastructure is an innovative transportation infrastructure that may be able to secure a safe transportation environment as well as efficient operation by connecting up-to-date skills including a broad range of wire and wireless communication-based information, control and electronics technologies. When integrated into the marine transportation infrastructure by the standard requirements, these standard technologies help monitor and manage navigational aids. After investigated on current status of marine transportation system, verified on integrating marine transportation systems, the standard requirements have to suggest a appropriate way of integrating marine traffic systems and proper way of using old marine traffic infrastructure.