• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.28-30
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• 2020

우리나라 해역은 크게 동해, 서해와 남해로 나뉜다. 해역별 특성은 공간적 및 유체역학적으로 상이하여 해역별 수중거주시설의 설계에 있어 서로 다른 주요건과 시설구성을 필요로 한다. 본 연구는 거시적 수중주거시설 설계기술 연구의 일환으로서 특히 해역별 공간 특성을 잘 갖춘 3곳의 입지 후보지(동해:Phoenix point, 남해:South Brother point와 서해:Mud point)에 대하여 요구되는 해역별 설계 환경부하를 최근 태풍Haishen, 태풍Maysak과 태풍 Bavi의 기상 예측자료 및 관측자료를 통해 비교하고 가정한 건축목표(Phoenix point: 속초시에 탈탄소 전력공급, South Brother point:부산항 수소연료 비축기지 및 해상 수소충전소, Mud point:에너지 자립형 기후중립 수산양식 기지)에 부합하도록 시설구성을 제안함으로써 우리나라 연안의 천해와 심해에서의 수중거주 가능성을 조사했다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.86-88
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• 2023

선박의 입출항을 위해서는 항만 시설과의 유기적 연계가 필요하며 이는 자율운항선박에도 마찬가지로 적용된다. 항만 인근의 복잡한 해상교통 상황과, 정박지나 항로 등 항계 내에서 고려해야할 추가적인 환경 조건들은 자율운항선박의 운항의 난이도를 높이며, 항만의 시간/공간적 자원들을 고려하는 가운데 입출항을 수행하는 것은 자율운항선박과 항만 시설과의 연계를 필요로 한다. 본 논문에서는 스마트항만과 자율운항선박의 연계를 통해 안전한 입출항을 수행할 수 있도록 하는 입출항지원시스템의 연동 구조 설계 결과와 이에 대한 시뮬레이션 시험 환경 구축 결과를 다룬다.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.26 no.1
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• pp.1-10
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• 2021

In this study, Information for the case of seawater flooding and observation data over a period of 10 years (2009~2018) was collected. Using machine learning algorithms, the characteristics of the types of seawater flooding and observations by type were classified. Information for the case of seawater flooding was collected from the reports of the Korea Hydrographic and Oceanographic Agency (KHOA) and the Korea Land and Geospatial Informatics Corporation. Observation data for ocean and meteorological were collected from the KHOA and the Korea Meteorological Agency (KMA). The classification of seawater flooding incidence types is largely categorized into four types, and into 5 development types through combination of 4 types. These types were able to distinguish the types of seawater flooding according to the marine weather environment. The main characteristics of each was classified into the following groups: tidal movement, low pressure system, strong wind, and typhoon. Besides, in consideration of the geographical characteristics of the ocean, the thresholds of ocean factors for seawater flooding by region and type were derived.

• Journal of the Society of Naval Architects of Korea
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• v.59 no.6
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• pp.423-431
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• 2022

In this paper, the results of Planar Motion Mechanism (PMM) test for a 1/15 scaled model of the MARIN Joubert BB2 submarine is dealt with to derive the maneuvering coefficients for surface condition. For the depth of surface navigation, the top of the sail was exposed 0.46 m above the water surface in the model scale, and it corresponds to 6.9 m in the full scale. The resistance and self-propulsion tests were conducted, and the model's self-propulsion point was obtained for 1.328 m/s, which corresponded to 10 knots in the full scale. The maneuvering tests were performed at the model's self-propulsion point, and the maneuvering coefficients were obtained. Based on the maneuvering coefficients, a turning simulation was performed for starboard 30 degree of stern fins. The straight-line stability and control effectiveness in the horizontal plane were analyzed using the maneuvering coefficients and compared with the appropriate range. For the analysis of the neutral fin angle of the X-type stern fin, the stern fin test with drift angles was carried out. As a result, the flow straightening effect at lower and upper parts of the stern fin was discussed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.209-211
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• 2022

우리나라 R-Mode(Ranging Mode) 항법시스템은 국제해사기구(IMO, International Maritime Organization)에서 요구하는 항구 입출항용 항법 요구성능(정밀도 10m)을 만족하도록 개발을 진행하고 있다. R-Mode 항법시스템은 위성국 송출을 기반으로 하는 GPS와 달리 지상국 송출을 기반으로 한다. 또한 신호가 세기가 높아서 의도적 전파간섭이 어려우므로 국제해사기구가 요구하는 강인한 PNT(Resilient PNT) 시스템에 적합한 것으로 평가받고 있다. 이러한 요구조건과 기회신호(SoOp, Signal of Opportunity)의 국내 환경에 맞추어 중파(MF, Middle Frequency) 및 초단파(VHF, Very High Frequency)를 이용하는 항법시스템을 개발하고 있다. 해양수산부의 지원으로 2020년에 착수하여 4국의 중파 R-Mode 송신국과 3국의 초단파 VDES R-Mode 송신국 구축을 진행하고 있다. 항법 성능을 확보하기 위하여 R-Mode 보정시스템과 R-Mode 감시시스템을 구축하였다. 해양에서 R-Mode 항법시스템의 성능을 검증하기 위하여 중파 R-Mode 수신기, VDES R-Mode 수신기 및 이를 포함하는 통합항법수신기를 함께 개발하고 있다. 항법 송신기 및 수신기의 성능 검증을 위한 테스트베드는 기존의 지상파 항법(eLoran) 서비스 영역, 중파 R-Mode 서비스 영역 및 주요 항만 등을 고려하여 충청남도 서산시 대산항 지역으로 선정하였다. 보정국 및 감시국을 포함하는 테스트베드 기지국은 대산항에 설치하여 운영을 시작하였다. 테스트베드 실해역 시험을 통한 성능 검증은 2023년 상반기에 진행될 계획이다.

• Management & Information Systems Review
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• v.33 no.5
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• pp.185-212
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• 2014

This study investigated the base of marine leisure facilities and studied the future vision for development of marine industry by conducting a systematic analysis on the category of marine leisure products for development of design and specialization of southeast area of Korea. If the age of $20,000 of per capita national income is called 'the age of my car', $20,000 of per capita national income is called 'the age of my boat'. According to the report of UK-based Marine South East, the scale of world's small boat and personal waterborne equipment reached 277 trillion won in 2010 and domestic market scale is expected to be 11 trillion won. Marine leisure facilities are the new growth engine industry that the government should promote as a nation's strategic and core industry, and the government is pushing ahead with promotion of marine industry actively by announcing Marine Leisure Equipment Industry Activation Plan(June 2009, Ministry of Knowledge Economy), Marine Leisure Activation Plan(July 2010, Ministry of Land, Infrastructure and Transport), The 1st General Plan for Marina Port(January 2010, Ministry of Land, Infrastructure and Transport) etc. The purpose of marine design lies in seeking the status of the country and qualitative value in human life through functional, artistic, industrial and cultural development of design elements for all marine activities made around the sea. Related to all activities made in the ocean and cost, marine design is a sphere of design that includes special conditions centering around water. Considering the condition that 3 sides of land are facing the sea, this study systematically analyzed present condition of equipment possessed by each area, type of facilities, operational status, current status of sectoral use of marine leisure facilities and future prospect of marine leisure products that become the basis of value to raise the statue as an advanced marine power in 2010s through development of the qualitative level of the people, establishment of the direction of national strategy, convergence of industry and culture and specialization of area focusing on the actual condition survey of marine leisure facilities. Especially, this study will be predicting the basis of strategy for strengthening marketability and competitiveness by suggesting role and process of design in developing a promising marine leisure product through an actual condition survey of marine leisure products of southeast area.

• 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.

• Journal of the Korean Society of Marine Environment & Safety
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• v.26 no.7
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• pp.858-863
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• 2020

We experimented with the particle-settling velocity and CHCl3 absorption efficiency of seven activated-carbon and analyzed seven heavy metal contents by elution for application to the field treatment of sunken HNS on the marine seabed. The mean particle-settling velocity was in the range 0.5-8 cm/s, except when the 8-20 mesh was used. The larger the HNS particle, the faster the particle-settling velocity was, and the CHCl3 absorption efficiency increased considerably owing to the larger surface area. In addition, the elution test results showed that the total Zn and As contents in >100-meshed activated carbon was higher than the contents criteria for the standard for water-treatment agents, and Cr, Zn, and As were released at higher concentrations than those released by other activated-carbon groups. Taken together, the CHCl3 absorption efficiency, settling velocity, and elution test results suggested that the 20-60, 20-40, and 2mm&down mesh activated-carbon adsorbents could be applied to the field treatment of HNSs and that the minimum required amount for field treatment were 0.82, 0.90, and 1.28 ton/㎘, respectively, as calculated based on the HNS-adsorption-capacity priority.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.109-110
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• 2002

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.334-335
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• 2002