• Title/Summary/Keyword: Ship accidents

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The Protection Potential Decision by Electrochemical Experiment of Al-Mg-Si Alloy for Ship in Seawater (해수용액에서 선박용 Al-Mg-Si 합금의 전기화학적 실험에 의한 방식전위 결정)

  • Jeong, S.O.;Park, J.C.;Han, M.S.;Kim, S.J.
    • Corrosion Science and Technology
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    • v.9 no.1
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    • pp.48-55
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    • 2010
  • The many vessels are built with FRP(Fiber-Reinforced Plastic) material for small boats and medium vessels. However, FRP is impossible to be used for recyclable material owing to environmental problems and causes large proportion of collision accidents because radar reflection wave is so weak that large vessels could not detect FRP ships during the sailing. Hence, Al alloy comes into the spotlight to solve these kinds of problems as a new-material for next generation instead of FRP. Al alloy ships are getting widely introduced for fish and leisure boats to save fuel consumption due to lightweight. In this study, it was selected 6061-T6 Al alloy which are mainly used for Al-ships and carried out various electrochemical experiment such as potential, anodic/cathodic polarization, Tafel analysis, potentiostatic experiment and surface morphologies observation after potentiostatic experiment for 1200 sec by using the SEM equipment to evaluate optimum corrosion protection potential in sea water. It is concluded that the optimum corrosion protection potential range is -1.4 V ~ -0.7 V(Ag/AgCl) for 6061-T6 Al alloy, in the case of application of ICCP(Impressed current cathodic protection), which was shown the lowest current density at the electrochemical experiment and good specimen surface morphologies after potentiostatic experiment for Al-Mg-Si(6061-T6) Al alloy in seawater environment.

Building of Navigation Guiding System for Small Ships (소형선박의 항해가이딩시스템 구축)

  • Hong, Tae-Ho;Seo, Ki-Yeol;Park, Gyei-Kark;Choi, Jo-Cheun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.159-163
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    • 2005
  • Marine accidents of 70.9% have been caused by small ships less than 100 tons in the past 5 years(1998${\sim}$2002). This is ascribable to the graying and lack in expertise on shipping of small ship operators, and merchant ships are hindered from coastal navigation due to the increase of coastal fishing boats and liners. Currently, ECDIS and GPS Plotters are widely used as navigation equipment providing route information to operators, but it can not give any function of automatic route creation and route explanation, so they are available only experienced operators. Especially, the present situation is that no study is made of the automatic route creation and route explanation using ENC for ECDIS, substitution system of paper chart. In this paper, Navigation Guiding System(NGS) is proposed to generate an optimal route where ENC and GPS data is fusioned including the wind speed and direction of anemometer. The proposed system was testified by a simulation, and its effectiveness was verified.

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A methodology of the IMO e-navigation strategy for the development of a new maritime ICT policy (신 해양정보통신 정책 개발을 위한 IMO e-navigation 전략 개발 방법론)

  • Shim, Woo-Seong;Lee, Sang-Jeong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2011.10a
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    • pp.316-319
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    • 2011
  • During the past several decades, the development of the maritime policy have been focused on the level of regulation based on the lessons from the individual accidents. Recently, the development of IMO e-navigation strategy has been discussed actively and has been focusing on the new frame and architecture based on the user requirements and definition of function and services for user requirements, which might produce the user-friendly policy, infrastructure and user service. For the new maritime ICT policy getting fusion of ICT and innovation of ship/ocean industry, the overarching methodology, as IMO e-navigation strategy, should be applied to primarily setup the architecture from the user requirements to technology. In this paper, we analyze the IMO e-navigation strategy procedure and provide the consideration and lessons for the strategic methodology to develop a new maritime ICT policy.

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A Study on Korean Seafarer's Perceptions Towards Unmanned Ships (무인화 선박에 대한 한국 선원들의 인식에 관한 연구)

  • D'agostini, Enrico;Ryoo, Dong-Keun;Jo, So-Hyun
    • Journal of Navigation and Port Research
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    • v.41 no.6
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    • pp.381-388
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    • 2017
  • Recently, renewed attention for technological applications within the maritime industry has taken place, particularly regarding unmanned vessels. There has been a lot of interest about the number of projects aiming at testing the operational feasibility of unmanned vessels, particularly in relation to technological, safety and security issues. Nevertheless, no studies have investigated this issue from the point of view of seafarers towards unmanned vessels; this paper aims at filling this gap. Data has been collected through a survey questionnaire. A Pearson correlational coefficient has been used to test the correlation between some of the variables. The results show that more than half of the respondents indicated that unmanned vessels do not contribute to an increase in accidents at sea. In addition, seafarers believe unmanned vessels will not be operational in the near future, with most of the respondents indicating a 10-20 year time frame. Thirdly, most of the respondents(both officers and ratings).

An Exploratory Study of the Effects of Mobile Phone Dependency on Maritime Safety

  • Davy, James G.;Noh, Chang-Kyun
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2012.10a
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    • pp.51-52
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    • 2012
  • Safety at sea continues to be an important topic for research. The factors that contribute to safety issues are often complex and unclear. Lack of non-technical skills in such areas as communication, teamworking, situational awareness, decision making etc. are well documented as directly affecting safety in high risk work settings such as on board merchant vessels. Competence in non-technical skills can be affected by various habits and circumstances that influence a worker and result in either positive thinking and behaviour or negative thinking and behaviour. Negative thinking can cause stress, anger, frustration; loneliness etc. and this can possibly result in behaviour or actions that undermine the safety of crew and ship. Factors that may contribute to these negative thoughts and behaviours are many and varied and this paper will be looking at one aspect: mobile phone use. In the Republic of Korea, dependency on mobile phones is uniquely high. Maritime students are also susceptible to such dependency and this paper will demonstrate that the symptoms associated with mobile phone addiction and dependency, and in particular the symptoms of withdrawal, are important factors that need to be mitigated in order to improve safety at sea. Although the benefits of mobile phones are many it will be suggested that over-reliance, dependency or addiction can result in negative thinking or behaviour that may directly or indirectly contribute to the factors that cause incidents and accidents at sea. It will be suggested that the most appropriate method of dealing with this problem is twofold: firstly, through training at the educational level and secondly, by encouraging the shipping industry and government to invest more into providing seafarers with better access to the communication methods that they are used to on shore in order to improve work conditions.

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Analysis on the navigation risk factors in Gunsan coastal area (1) (군산 연안 해역 항행 위해 요소 분석 (1))

  • JUNG, Cho-Young;YOO, Sang-Lok
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.53 no.3
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    • pp.286-292
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    • 2017
  • The Coastal VTS will be continuously constructed to prevent marine traffic accidents in the coastal waters of the Republic of Korea. In order to provide the best traffic information service to the ship operator, it is important to understand the navigation risk factor. In this study, we analyzed the navigational hazards of Gunsan coastal area where the coastal VTS will be constructed until 2020. For this purpose, major traffic flows of merchant ships and density of vessels engaged in fishing were analyzed. This study was conducted by Automatic Identification System (AIS) and Vessel Pass (V-PASS) data. The grid intervals are 10 minute ${\times}$ 10 minute (latitude ${\times}$ longitude) based on the section of the sea. A total of 30 sections were analyzed by constructing a grid. As a result of the analysis, the major traffic flows of the merchant vessels in the coastal area of Gunsan were surveyed from north to south toward Incheon, Pyeongtaek, Daesan, Yeosu, Pusan and Ulsan, and from east to west in the port of Gunsan Port, 173-3, 173-6, 173-8, 183-2, 183-5, 183-8, 183-3, 184-1 and 184-2. As a result of the study, the fishing boats in Gunsan coastal area mainly operated in spring and autumn. On the other hand, the main traffic flow of merchant ships and the distribution of fishing vessels continue to overlap from March to June, so special attention should be paid to the control during this period.

A Study on the Validity of Proper Maximum Navigation Speed in a Straight Waterway (직전항로에서의 적정 최대속력에 대한 검토.연구)

  • Park Young-Soo;Jong Jae-Yong;Park Jin-Soo
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.12 no.2 s.25
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    • pp.139-144
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    • 2006
  • Recently, ships' average navigation speed become faster than before because of the increasing of high-speeds vessel including container ships and passenger-ferries. So, it is considered that the speed limit in the navigation channel in Korea isn't proper for vessel management in these days. Also, there is rare paper studies about the speed limit quantitatively and numerically, especially the speed limit is discussing continuously, as abrogation of Incheon Port's speed limit and alleviation of Gwang-yang Port's speed limit according to the requests by the navigating mariners. Consequently this paper deals with the effectiveness of speed limits using the Environmental Stress Model, after replay of the navigation traffic flow in the straight waterway using marine traffic flow simulation technique.

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Loss of Lives caused by Ship Accidents and Corporate Criminal Liability (해양 선박사고로 인한 인명피해와 기업의 형사책임 - 영미의 사례 및 세월호 침몰사건과 관련하여 -)

  • Kim, Jong-Goo
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.20 no.6
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    • pp.721-729
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    • 2014
  • The purpose of this article is to examine maritime accident and corporate criminal liability in comparison with cases and laws in UK and US. In Anglo-American law, a corporation can be convicted of and sentenced for a criminal offence. However, some theoretical difficulties lie in fixing a corporation with the appropriate mens rea. The Corporate Manslaughter and Corporate Homicide Act 2007 in England is to solve those difficulties and punish a corporation like a natural person. Comparing to Anglo-American law, a corporation is difficult to be punished in Korean law because it is a well recognized theory that only natural person is capable of committing a crime. However, safety in society and workplace is earning great concern in Korea, and emphasis is put on responsibilities of corporations. This article discusses the need for legislation on corporate manslaughter act in Korea with regard to the sinking of the MV Sewol.

Block Media Communication System for Implementation of a Communication Network in Welding Workplaces (용접 작업장 통신네트워크 구축을 위한 블록매체통신시스템)

  • Kim, Hyun Sik;Kang, Seog Geun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.26 no.4
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    • pp.556-561
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    • 2022
  • In this paper, we present a block media communication (BMC) system which employs powerline communication to the equipments used in the welding process for ship-assembly and uses metal block as a communication medium. Inductive couplers are installed on digital feeder and pin jig. Information signal is added to the current generated by the welding gun, and applied to the block. When the welding operation starts, information generated in the field is transmitted to the monitoring server in real-time. The field test on the BMC system confirms that the transmitted data are correctly received at the server. Since the proposed system can be built without any changes to the existing welding process, it is helpful to increase competitiveness of the shipbuilding industry through smart factory of shipyards. It is also possible to quickly respond to emergency situations that may occur to workers in an electromagnetic wave shielding environment or a closed space, the effect of preventing industrial accidents will be great.

Prediction of Oil Outflows from Damaged Ships using CFD Simulations (손상 선박의 기름 유출량 예측을 위한 CFD 시뮬레이션)

  • Moon, Yo-Seop;Park, Il-Ryong;Kim, Je-In;Suh, Seong-Bu;Lee, Seung-Guk;Choi, Hyuek-Jin;Hong, Sa-Young
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.2
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    • pp.394-405
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    • 2022
  • This paper presents the numerical estimation results of oil outflows from damaged single-hull and double-hull ships by using computational fluid dynamics (CFD) simulations. A CFD method for multi-phase flow analysis was used, and the effects of numerical parameters on oil flows was investigated. Numerical simulations were conducted to predict the changes in oil outflows under various damage conditions owing to grounding or collision accidents and verified through available experimental results. The present numerical results showed a good agreement with the experimental results according to the geometrical characteristics of single and double hulls. In particular, the oil outflows from double hulls accompanying complex interactions between water and oil were reasonably predicted a shown in the experiment. This study established a reliable CFD technique necessary for estimating the oil outflows of damaged ships.