• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.226-227
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• 2021

항만 및 부대 시설은 건설 계획이 마련되고 실제 건설이 이루어지기까지 5~10년 이상의 시일이 소요되는 사업으로, 해당 계획이 진행될 당시의 선박의 제원을 바탕으로 마련될 경우 실제 시설의 건설이 완료되고 운영 시 선박의 대형화, 주요 제원의 변경 등을 반영하지 못하고 있다. 특히 항만의 경쟁력 확보를 위하여 향후 항만의 통항 선박에 직접적인 영향을 미치는 교량의 형하고, 통항로를 교차하는 형태의 항공기 운항 등 시설물의 계획 시 장래 추정되는 선박의 제원이 고려되어야 한다. 본 연구는 과거 컨테이너 선박의 제원 변화를 추세분석하였고, 주요 항로에 존재하는 교량의 형하고 등을 분석하여 현재 빠르게 진행되고 있는 컨테이선 선박의 대형화를 분석하고, 항만 및 부대 시설 건설 시 고려해야할 기간 기준 마련의 필요성 및 그에 따른 장래 선박의 제원을 추정하여 제안하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.236-237
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• 2023

선박무선통신장비는 선박이 항해하는데 필요한 안전정보, 선박교통 모니터링 및 관제, 입·출항 정보를 교환하기 위한 필수 장비이므로 선박항해사는 무선통신 내용을 항상 주의 깊게 청취해야 함. 본 연구에서는 선박의 실제 음성 교신데이터 500시간 데이터를 수집 및 학습하고, Wav2Vec 및 Whisper 모델을 활용하여 한글 및 영어(해사영어) 음성인식 모델을 개발하고 실용화를 수행하였다. 음성인식 모델의 성능은 CER(Character Error Rate) 기준 94.5%로 향후 선박 운항 관련 댜양한 분야에 적용이 가능할 것으로 사료된다.

• Proceedings of KOSOMES biannual meeting
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• 2008.05a
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• pp.81-89
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• 2008

The Maritime High School's Two plus One Onboard Training system is introduced to increase amount of graduate students to board on a ship for improvement of Ministry of Land, Transport and Maritime Affairs' policy. Students with this system study in school for two years and complete practices in ship for one year so that graduate students from this system can get officer license with only interview exam. This program Iud been developed to attract more graduate students to board on ships longer according to the fact that students now are avoiding life on ships. Four years after the system had been introduced, this research aims to find out problems of the system by questionnaire regarding practices on ships to current students from which to introduce methods of leading longer lie on ships of students.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.2
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• pp.355-362
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• 2021

To facilitate low-pressure selective catalyst reduction (L.P SCR), a high exhaust-gas temperature of a four-stroke diesel engine for a ship's generator is required. This study aimed at reducing the exhaust-gas temperature by adjusting the valve open-close timing and fuel injection timing to satisfy the operating conditions of L.P SCR and prevent accidents associated with the generator engine due to high temperature. To lower exhaust-gas temperature, the angle of the camshaft was adjusted and the shim of the fuel injection pump was added. As a result, the maximum explosion pressure increased and the average of the turbocharger outlet temperature dropped. Considering the heat loss from the turbocharger outlet to the SCR inlet, the operation condition for L.P SCR was satisfied with 290 ℃. The study demonstrates that safe operation of a diesel generator can be achieved by lowering the exhaust-gas temperature.

• Journal of Arbitration Studies
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• v.28 no.4
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• pp.153-172
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• 2018

In solving international commercial disputes, arbitration has a unique advantage. Therefore, when most parties sign a charter party, they contain arbitration clauses. Whether the arbitration clause in the charter party can be effectively incorporated into the bill of lading and bind to the third party-bill holder becomes an important issue. Based on the problem above, this paper compares the arbitration system between Korea and China, and discusses the composition of the Chinese Maritime Court and the Chinese court's adjudication of arbitration for foreign countries, which are recognized and enforced in China. What is most important in this study is observing the Chinese case from the beginning of 2000 to the present in order to rule whether the Chinese court can effectively incorporate the arbitration clause in the charter party into the bill of lading, as well as whether it constitutes an effective binding force for third parties and changes in standard of recognition. Finally, through comparative analysis, the study concludes that in China, the arbitration clause in the charter party can be effectively incorporated into the bill of lading, and that the conditions for the third parties can be effectively restrained. There must be several points to be noted when recording the bill of lading. This would then help reduce the legal risks and promote the sustainable development of international transactions.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.2
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• pp.238-246
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• 2021

Collision of small vessels such as fishing boats cause great personal injury. Prior to this study, the collision prevention algorithm was developed to assess the collision risk and make the collision alarm. However, a service provided for safety, such as a collision warning, not only prevents risks, but also requires a certain degree of user satisfaction to function effectively. In this study, the collision prevention algorithm for small vessels was improved to be more practical, and the effects of the improvement were confirmed by applying the algorithm. A survey conducted on the users of the collision warning service confirmed the user requirements for improving the accuracy of the collision warning system and reducing the volume and number of alarms. Accordingly, the algorithm was improved for user satisfaction, and the actual vessel experiment was performed applying the improved algorithm in an actual maritime environment. As a result, the frequency of alarm occurrence decreased compared to former algorithm, but the alarm was relatively steadily generated in dangerous situations. It was analyzed that the accuracy and practicality of the collision alarm were improved. If the practicality and reliability of the improved algorithm are verified in the further study, it will be able to effectively contribute to the prevention of collisions of small vessels.

• Journal of Navigation and Port Research
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• v.45 no.3
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• pp.109-116
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• 2021

The explosion of a chemical tanker ship during cargo transshipment via double-banking at Ulsan Port, resulted in major damage including fires involving nearby ships. As a follow-up measure to prevent the recurrence of similar accidents, the 'Safety Management of Dangerous Goods in Port' was established, and the designation of a transshipment pier for dangerous goods is required given the risk of explosion and the impact on major facilities in the port. This study evaluated the Fire & Explosion Index of major transshipment cargoes in Ulsan Port to design a transshipment pier based on the Explosion Risk Assessment. Based on the results of Fire & Explosion Index evaluation of styrene monomer and benzene, severe explosion risk was confirmed, and the exposure radius was calculated. Based on the results of the exposure radius, the risk range for each major pier was calculated, and 12 terminals were proposed as transshipment pier candidates considering port facilities, surrounding dangerous facilities, and residential aspects. Since the results of the study suggest transshipment piers based on the risk radius alone, maritime traffic safety, pier and mooring facilities, safety facilities and accessibility for emergency response should be considered comprehensively to designate actual transshipment piers.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.6
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• pp.620-627
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• 2023

Ship noise is one of the important factors for the living and health of seafarers, and ef orts to reduce ship noise are actively underway. There are two methods of noise reduction: passive noise Control (PNC) and active noise control (ANC). Unlike cars and airplanes, ANC is not widely used for noise reduction on ships. This study aimed to reduce the noise generated in the engine room by using soundproof panels and high-frequency vibration generators, as well as active noise control (ANC). For this purpose, an experimental model was made using an acrylic box, and the noise reduction effect was measured under four conditions. The experimental results are as follows: First, the soundproof panel had a noise reduction effect in all ranges from 55 dB to 85 dB. In the case of using a high-frequency vibration generator, there was no ef ect in the low noise range such as 55 dB(A), but there was a noise reduction effect in the high noise range such as 70.8 dB(A) and 85 dB(A).Second, when the soundproof panel and the high-frequency vibration generator were used simultaneously, the noise reduction ef ect was up to -2.2 dB(A). The results of this experiment were obtained from an experimental model made of acrylic, and they may be different from actual ships made of steel plate. In future studies, we plan to experiment using iron plate (considering the material, thickness, and structure) used in actual ships. We hope that this study will help to improve the living environment and health of seafarers on ships.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.105-109
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• 2006

LNG 선박의 급증에 의한 승무원 심각한 부족현상에 대비하여, STCW의 전면 개정 등과 같은 IMO의 대응은 물론 각 국가에서도 승무원 양성을 위한 교육과정의 개설은 물론 관련 법제 정비 등으로 대응방안을 마련하고자 노력을 하고 있다. 이러한 시점에서 국제해사대학연합과 한국해양대학교를 중심으로 한 아시아 LNG 교육훈련센터에서는 향후 국제무대에서 활약할 LNG 교육훈련강사를 양성하기 위한 전문과정을 추진하고 있다. 이 발표에서는 LNG 교육훈련 전문강사 과정의 개요를 살펴보고, 이러한 과정을 효율적으로 운영하기 위한 시뮬레이터의 활용방안에 대하여 설명하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.245-246
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• 2013

최근 들어 세계적으로 선복량의 급격한 증가로 인해 해기사의 수가 매우 부족한 실정이다. 해운선진국들은 해기사 확보를 위해 국가별 고유한 정책을 세우고 이에 대응하고 있다. 우리나라도 예외는 아니어서 해운선사별로 양질의 해기사수급을 위해 적극 노력하고 있지만 만족할 만한 성과는 거두지 못하고 있다. 이 연구에서는 현재 해운선사 및 해기교육기관에서 진행되고 있는 교육내용을 살펴보고 아울러 사이버 해기교육기관 설립을 위한 기초적 조사분석을 실시하였다.