• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.4
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• pp.504-510
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• 2019

Practical test items were analyzed to extend the existing scoring method for boat operator licenses to an electronic scoring method. We have attempted to digitize the method within the current practical test system scope and have developed an electronic scoring system using LiDAR sensors and WAVE communication. The results of the study are as follows; the first, the scoring data entered into the LiDAR and examiner score device on the boat were transferred from an integrated processing unit to a land control center through WAVE communication. The system was constructed and verified to store and manage examinee data. Second, when testing the meandering task, accurate distance measurement was achieved by using LiDAR instead of visually observing the stick (3 m), and an accurate distance was displayed through the examiner score device quickly. Finally, we confirmed that it is possible to smoothly transmit and process the WAVE communication used to transfer the score data acquired from the boat to the monitoring center at a high speed without loss.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.329-331
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• 2022

국내 '수상레저기구 안전검사 기준(해양경찰청 고시)' 의 고무보트 안전검사 기준을 국제 표준 및 관련 법령(ISO-6185, 미국 ABYC 단체표준, 미국해양경비청 USCG, 뉴질랜드 해양법 NZ Maritime Law)과 비교를 통해 안정성(stability) 확보를 위하여 개선 방안을 제시하고자 한다. 현행 '수상레저기구 안전검사 기준'의 고무보트는 승선정원 13인 이상 및 특정 항해 구역에 대해서만 복원성 조건을 요구하고 있어 13인승 이하의 고무보트는 안정성 조건이 전무한 실정이다. 특히, 국제 표준 및 관련 법령과는 약 38개의 검사항목에 누락 또는 미흡한 차이가 있으며, 이에 국내 기준과 국제 표준과의 비교 분석을 통해 개인의 최소 안전을 담보 할 수 있는 고무보트의 안전성 확보 방안을 마련하고자 한다.

• Journal of Navigation and Port Research
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• v.41 no.6
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• pp.359-364
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• 2017

This study examined business acts related to leisure boats, so as to investigate the differences of regulations and things to be supplemented, as well as to suggest improvement measures. In order to achieve this purpose, the authors analyzed the respective legislations. The Acts on businesses using leisure boats(or power-driven water leisure crafts) are the Marine Transportation Act, Excursion Ship and Ferry Business Act, Water-Related Leisure Activities Safety Act, and Act on the Development, Management, etc. of Marinas. These Acts have differences in regulations, in terms of gross tonnage, the age of vessels, crewman, and the liquor traffic. These differences can cause problems such as adjusting the gross tonnage of the vessel by modifying the structures of the facilities, assigning old vessels, sailing without crewmen required for safety, and going against fairness in the liquor traffic in similar businesses. Such differences appeared to be caused by the lack of understanding of leisure boats and the series of new legislation which have been added one by one. It is required to raise the understanding on the characteristics of leisure boats and reflect them in the legislation.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.4
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• pp.482-488
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• 2019

Leisure and business facilities have been steadily developing in Korea. Among waterborne leisure vessels and equipment, the distribution and sale of kayaks and canoes have significantly increased. Previously, (FRP) materials were primarily employed for constructing kayaks. However, owing to global warming and depletion of natural resources, the demand for non-polluting renewable energy is rapidly increasing, which has increased the demand for carbon fibers. To meet the requirements of changing social consciousness, a carbon fiber-based commercial kayak was designed in this study. Resistance analysis and structural safety were conducted by employing software tool for verifying the reliability of the proposed kayak. The pressure resistance and frictional resistance were examined in a wide range of speed. Obtained results indicate that at speeds greater than 2.6 m/s, the pressure resistance significantly increases and the total resistance also increases. Furthermore, the results corroborate that the proposed kayak structure has a adequate safety with respect to the design loads that are considered during operating conditions.

• Journal of Digital Contents Society
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• v.15 no.2
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• pp.227-235
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• 2014

The change from people's work-centered values to their leisure-centered values leads into the change in their life styles. In the circumstance, people's participation into sports activities seems to be an important means to improve their quality of life. Along with the change of the times, more people take part in water leisure sports including kayak. As a result, people's needs for various designs of water leisure goods are on the rise. In this sense, it is necessary to come up with strategies to actively respond to such a change. In this paper, we proposed a user decision-making support system for designing kayaks for leisure. Based on the previous studies and literatures and a questionnaire survey with consumers, it chose the sensitivity related to design. By conducting factor analysis and evaluation, it drew sensitivity and proposed kayak design layouts in the aspect of customer sensitivity preference. It is expected that the result of this study will be used not only for kayak design, but as a design guide for the equipment of water leisure sports, and will be applied for user-friendly design.

• Journal of Korea Ship Safrty Technology Authority
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• s.24
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• pp.74-89
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• 2008

본 연구는 RFID기술을 활용한 선박안전관리에 대한 것이다. 최근 선박안전법 개정으로 2008년부터 2톤 미만의 선박검사와 수상레저기구의 검사 등 선박의 종류 및 형태가 다양해지고 있어 선박의 등록 및 관리에 많은 어려움이 예상된다. RFID기술은 다양한 산업기술 분야에서 빠르게 활용되고 있으며, 이를 선박안전관리법에 적용하고자 하였다. RFID기술을 선박에 적용할 경우 선박의 도난 및 미수검 선박 방지에도 큰 효과를 얻을 수 있을 것으로 사료된다.

• 선박안전기술공단연구보고서
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• s.5
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• pp.1-73
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• 2007

본 연구의 목표는 RFID기술을 활용하여 선박검사업무의 신속한 처리와 2톤 미만선박 및 수상레저기구 등에 대한 선박관리, 유관기관과의 업무협조 원활 등 체계적이고 효율적으로 선박을 관리할 수 있는 선박안전관리시스템 도입에 대한 필요성및 타당성 검토와 이를 바탕으로 한 최적의 선박안전관리시스템 구축 방안을 제시하는 데 있으며,이를 위하여 각종 실험을 통하여 RFID시스템 선박적용 시 발생할 수 있는 기술적,환경적인 문제를 분석하고, RFID시스템 도입의 효율성과 활용방안을 제시하여본 연구의 달성도를 높이고자 함.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.1
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• pp.67-72
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• 2017

This study developed an electric power propulsion personal watercraft by combining a battery and an electric system from the domestic automobile industry with water motorcycle from marine leisure industry in a convergence of technology. It also developed a safety inspection plan and type approval standard for personal watercraft that use electric power propulsion. For the registration and production of the electric power PWC (Personal Watercraft), a safety inspection standard (draft) and type approval standard (draft) have been established. PWC that use this electric power propulsion certification standard have been divided into two categories according to the use of gasoline engines as related to the ship's electrical system. The contents of these safety inspections standards is divided into 7 categories, and their purpose is to confirm the facilities used for the safe operation of PWC. Type approval is divided into 7 categories and is intended to ensure the safe production of PWC. This is basic data can be used to establish criteria for safety inspection and type approval of electric power propulsion vessels and to guide the production of the environmentally friendly PWC in Korea.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.7
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• pp.1004-1010
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• 2021

Ship-floating object accidents can lead not only to a delay in ship's operations, but also to large scale casualties. Hence, preventive measures are required to avoid them. This study analyzed the spatiotemporal aspects of such collisions based on the data on ship-floating object accidents in sea areas in the last five years, including the collisions in South Korea's territorial seas and exclusive economic zones. We also provide basic data for related research fields. To understand the distribution of the relative density of accidents involving floating objects, the sea area under analysis was visualized as a grid and a two-dimensional histogram was generated. A multinomial logistic regression model was used to analyze the effect of variables such as time of day and season on the collisions. The spatial analysis revealed that the collision density was highest for the areas extending from Geoje Island to Tongyeong, including Jinhae Bay, and that it was high near Jeongok Port in the West Sea and the northern part of Jeju Island. The temporal analysis revealed that the collisions occurred most frequently during the day (71.4%) and in autumn. Furthermore, the likelihood of collision with floating objects was much higher for professional fishing vessels, leisure vessels, and recreational fishing vessels than for cargo vessels during the day and in autumn. The results of this analysis can be used as primary data for the arrangement of Coast Guard vessels, rigid enforcement of regulations, removal of floating objects, and preparation of countermeasures involving preliminary removal of floating objects to prevent accidents by time and season.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.7
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• pp.902-909
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• 2023

This study evaluated the performance test of a small-sized LTE-Maritime(LTE-M) transceiver that was developed and promoted to expand the use of intelligent maritime traf ic information services led by the Ministry of Oceans and Fisheries with the aim of supporting the prevention of maritime accidents. Accoriding to statistics, approximately 30% of all marine accidents in Korean water occur with ships weighing less than 3 tons. Therefore, the blind spots of maritime safety must be supplemented through the development of small-sized transceivers. The small transceiver may be used in fishing boats that are active near coastal waters and in water leisure equipment near the coastline. Therefore, verifying whether sufficient performance and stable communication quality are provided is necessary, considering the environment of their real usage. In this study, we reviewed the communication quality goals of the LTE-M network and the performance requirements of small-sized transceivers suggested by the Ministry of Oceans and Fisheries, and proposed a test plan to appropriately evaluate the performance of small-sized transceivers. The validity of the proposed test method was verified for six real-sea areas with a high frequency of marine accidents. Consequently, the downlink and uplink transmission speeds of the small-sized LTE-M transceiver showed performances of 9 Mbps or more and 3 Mbps or more, respectively. In addition, using the coverage analysis system, coverage of more than 95% and 100% were confirmed in the intensive management zone (0-30 km) and interesting zone (30-50 km), respectively. The performance evaluation method and test results proposed in this paper are expected to be used as reference materials for verifying the performance of transceivers, contributing to the spread of government-promoted e-navigation services and small-sized transceivers.