• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.08a
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• pp.123-128
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• 2004

A lot of efforts have been made to improve maritime safety by means of enhancing safety legislation and verifying the compliance thereof. However, with the development of mutual insurance, it is contributing more and more to better maritime safety. The P＆I clubs to be discussed in the paper are now not only exercising controls and providing guidance in event of emergencies, but also keeping close and continuous monitoring over safety operations and conditions of those vessels entered, through their world-wide network and advanced communication, and by professional accident-handling teams. In view of this, it is necessary to discuss the roles of commercial shipping and the close linkage between it and onboard safety practices. The paper looks at first basic principles in maritime insurance, and then focuses on the rules and activities of P＆I clubs and their implications upon shipboard operations.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.08a
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• pp.177-185
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• 2004

This paper describes Listening Decision Aid Simulator (LDAS) to provide a decision-supporting tool that can reproduce real-like listening situations focused on the duty officer's two ears. The sound propagation mechanism from a whistle to listener's two ears is established at first, and the spatial transfer coefficients of a bridge door are measured at training vessel. Then, the construction works with the spatial transfer coefficients and its evaluation experiments with five collision accidents are carried out. As results from tests, the five cases can be judge by LDAS; it led to the insight of practical use of LDAS as one of the decision supporting system in collision accidents.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.56-57
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• 2013

This paper is mainly concerned with the interaction effects between two vessels and sidewall with a mound. Experimental study on hydrodynamic forces between ship and sidewall with a mound was already shown in the previous paper, measured by varying the distances between ship and sidewall. The ship maneuvering simulation was conducted to find out the minimum safe distance between vessels, which is needed to avoid sea accident in confined waters.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.119-121
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• 2013

최근 대규모 선박 및 해양플랜트 사고 발생을 계기로 각국의 정부와 관련 업계에서는 안전사고 예방을 위한 규제를 강화하고 기업차원의 안전관리도 철저히 점검하고 있다. 선박사고의 경우에는 1989년 "엑슨발데스호" 사고를 계기로 국제해사기구(IMO) 주도하에 유조선의 "2중 선체 의무화"를 추진했으며, 2012년에는 전 세계적으로 공식 시행되고 있다. 해양플랜트 사고의 경우에는 1988년 북해(North Sea)에서 발생한 Piper Alpha 폭발사고를 계기로 인적요인에 대한 관심이 높아졌으며, 2010년 멕시코만에서 발생한 "딥워터호라이즌호" 사고 이후 시추작업에 대한 안전점검과 인적오류 예방 및 관리를 위한 훈련을 강화하고 있다(배영일, 2012). 일반적으로 해양플랜트 사고의 원인은 구조물 자체의 오류가 20%이하이며, 예기치 못한 작업자의 행동으로 발생된 사고가 80% 이상을 차지하고 있다. 즉, 대부분의 사고는 operation 또는 maintenance 동안 발생하는 것으로 나타나고 있다. 본 발표에서는 해양플랜트 산업에서의 사고와 관련된 최근 연구현황 및 향후 연구 방향을 소개하고자 한다.

• Journal of Navigation and Port Research
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• v.38 no.6
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• pp.561-565
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• 2014

This paper is mainly concerned with the interaction effects between two vessels and sidewall with a mound. Experimental study on hydrodynamic forces between ship and sidewall with a mound was already shown in the previous paper, measured by varying the distances between ship and sidewall. The ship maneuvering simulation was conducted to find out the minimum safe distance between vessels, which is needed to avoid sea accident in confined waters. From the inspection of this investigation, it indicates the following result. When and if one vessel passes the other vessel through the proximity of sidewall with a mound, the spacing between two vessels is needed for the velocity ratio of 1.2, compared to the case of 1.5. Also, for the case of ship-size estimation, the ship maneuvering motion is more affected by interaction effects for the overtaken small vessel, compared to the overtaking large vessel.

• Journal of Navigation and Port Research
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• v.37 no.5
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• pp.499-509
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• 2013

Seafarers are one of the main engines driving economic growth in the maritime sector. The International Maritime (IMO) Organization estimated that there were approximately 1.5 million seafarers around the world engaged in international trade in 2012. Data have shown that human casualties in maritime accidents around Japan have shown an increasing trend over the last ten years. One cause is human error, which is inseparable from the human element that influences mariner's decisions and actions. The Personal Identification (PIN) Safe method is one way to systematically identify substandard and unsafe actions by considering the error taxonomies associated with various scenarios for a maritime system. The results are based on analysis of the role of the human element in commonly reported unsafe actions when interacting with equipment and other systems. Furthermore, patterns of influencing shaping factors were observed on the basis of data processing; the aim of this study was to promote safety culture and provide an opportunity to improve safety at sea.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.211-212
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• 2019

Since nuclear power plant accident has occurred in Fukushima, marine pollution problem has been a hot issue due to discharging of contaminated water This paper deals in the marine environment monitoring sensor system. In this paper, we study on sensor and communication system to observe the various source of maritime pollution in realtime and transmit the measured date to observation center.

• Journal of Navigation and Port Research
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• v.42 no.5
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• pp.317-322
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• 2018

Marine weather information provided for vessels is mainly offered by radio devices such as NAVTEX, Weather Fax., and others. However, the information is too general for large areas, and lacks more detail. So, many seafarers are disinclined to use the information to initiate proper readiness of vessels' safety, avoiding marine accidents such as grounding, hull and cargo damage, but cannot develop an optimal and economical navigation plan, considering the inadequate level of low precision weather information. The purpose of this paper is to develop a strong wind warning system, based on the digital anemometer installed on the bridge. This study analyzed the data on 10-minutes average wind speed, when the vessel's grounding accidents happened in Korean ports. Results reveal that the vessel's strong wind warning algorithm, can estimate the growing of wind speed two-three hours in advance.

• Journal of Navigation and Port Research
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• v.29 no.2
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• pp.151-157
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• 2005

During the period of every summer to early autumn seasons, ships have been wrecked or grounded from effect of a typhoon in the water areas around Korean Peninsula Typhoon Rusa killed more than 100 people in September 2002. Super Typhoon Maemi passed southeast of South Korea in September 12-13, 2003, with a strong gale blowing at a record 60 m/s and caused much ship groundings, collisions and sinkings over 3000 in dockyards, harbors and places of refuge. These are things that could have been prevented had there merely been prior warning. This study outlines the occurrence characteristics of maritime accidents caused by a typhoon in South Korea for the period from 1962 to 2002. The distribution of the accident records is also compared with the trajectories, winds, central pressures of typhoons, passed during the 1990-2003. It is shown that attack frequency of typhoon and number of marine accidents is the highest in August and the marine accidents due to typhoon have a close relation to the distribution of accumulated wind and pressure fields.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2002.03a
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• pp.145-153
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• 2002

A coastwise chemical tanker sailing at full speed has capsized in calm water and whole turing. In the precious paper, we investigated reasons of the accident by demonstrating the proper correction for the free surface effect of the liquid cargo and the bow-sinkage effect. In this paper, we also carry out model experiments of a transverse pressure under the seawater and an outward heel moment according to the heel angle and rudder angle, on the basis of radius of turning circle, ship's speed and drift angle of model ship occurring in turning. It is also shown that the flooding of seawater onto the deck occurring in turning generated a significant outward heel moment and the vertical distance between the center of gravity of the ship and the renter of lateral water drag.