• Journal of Advanced Marine Engineering and Technology
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• v.39 no.1
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• pp.13-18
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• 2015

Characteristics of restoring force for the wind-powered leisure boat was investigated using mathematical formulation and commercial computational method such as the ANSYS Workbench CFX-Mesh. The objective is to find the restoring moment and heel moment while boat is sailing in windy power. Conditions for angle of attack were given from $5^{\circ}$ to $90^{\circ}$. It is known that side force is larger in terms of angle of attack is higher, however critical angle is suggested to limit before over of $60^{\circ}$ for safe navigation for boat in wind. Natural results are found that stronger heel moment is observed when sail is used than no sail, and higher angle of attack is induced stronger heel moment.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.16-17
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• 2022

해상교통환경은 기술 발전과 더불어 자율운항선박(MASS)의 출현에 직면하여 있다. 이러한 자율운항선박을 비롯한 다양한 해상이동체(드론, 무인선, 다목적 해양레저선 등)는 선박교통관제(VTS)의 추가 관리대상이 될 것이다. MASS 및 다양한 해상 이동체의 관제구역내 안전운항을 위한 VTS의 적극적 대응을 제안하고자 하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.7
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• pp.1355-1362
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• 2016

Recently, the marine leisure are being emphasized with improving the quality of life style by increased income and spare time. Also, there is a increasement of people's interest in marine leisure activities. But resources and facilities do not grow in proportion to the quantitative growth of the current marine leisure industry. Besides, a leisure ship operator tends to choose a simple or familiar route of the local area rather than a new leisure routes which are not explored due to lack of accessible areas information. This paper proposes a routes recommendation system in order to solve above problems based on marine resource database. The databases have been constructed through investigation and analysis of navigational information such as environmental conditions including weather conditions and sea status, field of marine leisure activities, tourist attractions and natural landscape, and marine leisure prohibited areas. Therefore we have developed and implemented the route recommendation system that provides various information necessary to route operation of leisure boats.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.55-60
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• 2006

최근 우리나라는 일반인들의 레저에 대한 관심이 고조되고 있고, 선진국형 해양레저에 대한 관심과 수요가 크게 증가하고 있는 실정이다. 특히, 해양레저의 꽃이라 할 수 있는 세일링요트 및 관련 장비 경우에는 대부분 전량 수입에 의존하고 있어 국산화 개발이 시급히 요구되고 있는 실정이다. 따라서 세일링요트 중에서 넓은 갑판면적 및 안정된 운항성능을 가지는 카타마란형 세일링요트의 선형설계와 형상에 따른 성능/특성 검증 위한 선형시험 등을 수행하여 국내에 적합한 카타마란형 세일링요트의 기초 자료를 정립하여 중소형조선소의 레저선박 관련 기술경쟁력 확보와 해양레저 활성화에 도움을 주고자 한다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.16 no.3
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• pp.202-210
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• 2013

As incomes increase, interest in ocean leisure picks up. As a result, a lot of research and developments on hull form design and production of planing boats, mostly used for ocean leisure, are needed. Analysis in researches on resistance of planing boats shows that resistance characteristic of planing boats is different from resistance characteristic of general boats because the former is fast, and its wetted surface is very small. Using Savitsky formula widely used in the calculation of effective horse power in shipbuildingyards, and propulsion system and engine manufacturers, this study calculated total resistance of a research planing boat. Then it analyzed the flow characteristics of the planing boat through theoretical analysis and wind tunnel experiment, and computed air resistance and lift force by changes of speed and trim angle. It also compared and analyzed result of theoretical analysis and experiment of the ratio of air resistance to total resistance under variations of velocity and trim angle. When the study is used to estimate more accurate effective horse power, it is expected to remedy abuses of unnecessarily installing high-powered engine. As nature disasters due to abnormal changes of weather increase, interest in greenhouse gas grows. International Maritime Organization (IMO) legislated Energy Efficiency Design Index (EEDI) and Energy Efficiency Operational Indicator (EEOI) to reduce ship greenhouse gas emissions. But this index will be applied to over 400 tons ships, small ships, emitting more greenhouse gases than larege ships per unit power, will dodge the regulations. Thus, this study indicated a problem by calculating greenhouse gas emissions of an ocean leisure planning boat (a small ship), and suggested the need for EEDI of small ships.

• Bulletin of the Society of Naval Architects of Korea
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• v.48 no.1
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• pp.23-29
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• 2011

• Bulletin of the Society of Naval Architects of Korea
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• v.43 no.2 s.148
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• pp.4-9
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• 2006

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.2
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• pp.224-234
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• 2022

This study is conducted to propose an activation plan for fisherinas by analyzing in depth the needs for fisherina development. For this purpose, the result is derived through the analysis of literature, in-depth interviews and Delphi methods. As a result, the need for fisherina development is shown as follows: first, the saturation due to the increase of maritime recreational vessels; second, the possibility of economic development; third, the activation of the fishing village economy. Accordingly, the problems of the fisherina are derived, first, the conflicts with fishermen and recreational vessel users, second, the financial difficulties, third, the lack of infrastructure. The activation plans for fisherinas are as follows: first, forming a consultative body centered on stakeholders; second, ensuring financial soundness; third, building infrastructure by linking businesses; and fourth, systematic supplementary plans. These results will play an important role in expanding the underdeveloped domestic fisherina business and will be another step in activating the maritime leisure industry.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.3
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• pp.411-418
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• 2017

In the domestic case, although technological capabilities are recognized globally in the IT field, it is actually that the technical capabilities of the domestic leisure ship market which is formed mainly by fishing vessels are not beyond their technical capabilities At the point where the GNP of our country already goes over 22,000 dollars, the demand for the products related to the middle and small leisure boats is gradually increasing, but most of the high added value products depend on the imports from U.S.A. and Europe. And in case of the cars, with the Car Navigation as the start, products which satisfies various demands of the users are coming out in large quantity and now the IT technology is the necessity which can not be lived without in the car industry. Thus, if the digital ship navigator which jointed the recent ICT technology which was applied to the land for the domestic middle and small leisure ships by utilizing the embedded hardware technology and mapping technology which are credible is developed and distributed, it will become not only the opportunity to improve the industry related to middle and small ship IT, but also, the export about overseas market can be expected.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2016.11a
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• pp.146-146
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• 2016

최근 국민 소득향상과 더불어, 여가시간 증가에 따라 해양레저에 대한 관심이 크게 높아지고 있으며, 그에 따라 레저용 선박 수요도 증가하고 있다. 기존 국내 소형 선박의 경우 FRP(fiber-reinforced plastic)재료로 선박을 건조해 왔다. 그러나 해양환경 규제 강화로 FRP 선박의 건조가 감소하고 있으며, 친환경 선박에 대한 필요성이 대두되고 있다. 따라서 FRP재료를 대체하는 선박용 재료로 친환경적이고 가벼운 소재인 알루미늄 합금 재료가 선박건조 분야에서 각광을 받고 있다. 특히 5000계열 Al-Mg 합금은 가공성과 용접성이 우수하여 주로 구조용으로 많이 사용되고 있으나 경량화에 따른 빠른 선속이 유체충격을 증가시켜 선체에 캐비테이션 손상을 일으킬 수 있다. Al-Mg 합금의 경우에 부식성이 대단히 큰 해양환경에서 부식과 캐비테이션 침식이 복합적으로 일어나면 손상이 빠르게 증가되는 경향을 나타내어 선박의 수명을 현저히 단축시켜 경제적인 손실을 초래한다. 따라서 본 연구에서는 해수 내에서 Al-Mg 합금의 캐비테이션 저항성을 향상시키기 위해 알루미늄 합금 표면에 내식성 뿐만 아니라 경도 및 내마모성 등의 기계적 특성이 우수한 산화피막을 형성시키는 양극산화 기술을 적용하고, 다양한 봉공처리(sealing)방법에 따른 캐비테이션 특성을 평가하였다. 캐비테이션 실험은 압전(piezoelectric) 효과를 이용한 진동발생 장치를 사용하여 $30{\mu}m$ 진폭으로 일정하게 유지하였으며, 시편과 혼 팁 사이의 간격은 1mm로 하였다. 캐비테이션 실험 후에는 시편을 초음파 세척하여 진공 건조기에서 24시간 이상 건조한 후 정밀저울로 무게를 측정하였으며, 표면 손상 형상을 분석하기 위해 주사전자현미경(SEM)과 3D현미경을 이용하여 관찰하였다.