• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.18-20
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• 2023

부표류 이설을 위한 필수 공정인 표체 권상작업을 생략하여, 중대 인명사고 개연성이 있는 유해·위험요인(중량물 낙하, 깔림 등) 제거를 통해 안전한 항로표지 작업환경을 도모하고자 방안을 공유함.

• Journal of Navigation and Port Research
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• v.43 no.6
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• pp.437-443
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• 2019

Aid to navigation is a navigational aid facility that informs a sailing vessel of its location and direction as well as a location of a specific obstacle by means of a light, shape, color, sound, radio wave, etc. It can be valuable in improving the safety of day and night vessel navigation at sea. For the safety of the tug boat, the minimum equipment requirements for each type of tug boat are arranged. Despite these preparations, the collision accidents between tug boats, barges, and light buoys can occur when the tug boat turns due to the length of the tow-line, tidal current, and the barge's momentum etc. The purpose of this study was to propose the basic system that analyzes the physical relationship between two vessels regarding the tug boat-barge-light buoy dynamics and propagate the corresponding data through the aid to navigation management & operation systems in use at each regional oceans and fisheries.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.84-86
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• 2019

해양관측정보 및 안전정보 제공을 목적으로 운영하는 해상 부이(등부표)에 영상정보감시 및 영상전송장치를 개발하여 설치 운영하고, 이를 통해 얻어진 영상정보 자료를 기반으로 시설물 유지관리 시 활용방안과 영상으로 실제 관측 가능한 해양 정보 등을 검토하였다.

• Journal of Navigation and Port Research
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• v.44 no.3
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• pp.166-173
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• 2020

AtoN Accident causes navigation dangerous to ships and reduces the credibility of aids to navigation. The most light buoys on the sea have the highest accident rate from the influence of sea weather such as wind, current, and waves. However, in Korea, despite the different sea weather conditions in each sea area, in calculating the dynamic stability of the light buoy, there is a problem that only limit value conditions are applied to all sea areas. Thus, the purpose of this study was to analyze the dynamic stability of the LL-26(M) light buoy, the most installed buoy of its kind on the sea and suggest a stable operation plan for the LL-26(M) light buoy. To achieve this, after analyzing the weather for each sea area of the previous study related to the light buoy, the dynamic stability (inclination angle) was estimated by applying to the representative light buoys of each sea area wherein the number of accidents caused by sea weather was high. As a result of this study, the inclination angle of LL-26(M) light buoy for each sea area was different. That is, the inclination angle caused by winds was 10.329°-36.868°, the inclination angle caused by currents was 0.123°-18.834° and the inclination angle caused by waves was 4.777°-20.695°. The results of study can be used as basic data useful for installation standards for each sea area for stable operation of the LL-26(M) light buoy.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.327-330
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• 2014

해양수산부 소속의 한빛호는 국내 유일의 부표정비와 항로표지 측정업무를 수행하는 항로표지 업무용 선박이다. 이 선박으로 연중 국내의 400mm 이상 중, 대형등명기의 광도값을 측정하여 분석평가하는 광파측정업무를 수행하고 있으나, 광파측정 시 환경적, 물리적, 제도적인 어려움으로 인하여 정기검사 수검에 어려움이 발생하고 있다. 이 방안에서는 그런 여러 가지 문제점을 해결할 수 있는 육상측정을 기본으로 효율적이고 안전하며 예산 또한 절감할 수 있는 방안들을 제시하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.83-84
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• 2018

평택지방해양수산청은 서해권역의 인천, 평택, 대산, 군산해양수산청의 부표류에 대한 점검업무를 수행하고 있다. 서해권역은 해역 특성상 안전을 위해 부표류의 설치가 해마다 증가하여 전국에서 가장 많은 기수가 설치 운영되고 있으며, 부표류의 이탈사고 또한 지속적으로 발생하고 있다. 부표류의 안정적 운영을 위한 점검 정비 및 사고 감소를 위한 업무의 개선이 필요하다. 본 연구에서는 부표류의 사고원인을 분석하고, 부표류 사고를 줄이기 위한 개선된 점검 정비 방법 및 효율적인 관리를 방안을 제시하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.365-372
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• 2007

The function of navigational aids are to be coincided with the development of navigational equipment and increase of traffics on the sea fairway. Supplementary function or side effect of wharf-edge illumination would be effective to indicate fairway indirectly and collision avoidance between ships and bridge against background light in port area at night also a serious-view light on the bridge posts would be effective to ensure the drifting ships by wind and current force adjacent bridge area.

• Journal of Navigation and Port Research
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• v.47 no.4
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• pp.231-238
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• 2023

The position of a light buoy is always flexible due to the influence of external forces such as tides and wind. The position can be checked through AIS (Automatic Identification System) or RTU (Remote Terminal Unit) for AtoN. As a result of analyzing the position data for the last five years (2017-2021) of a light buoy, the average position error was 15.4%. It is necessary to detect position error data and obtain refined position data to prevent navigation safety accidents and management. This study aimed to detect position error data and obtain refined position data by DBSCAN Clustering position data obtained through AIS or RTU for AtoN. For this purpose, 21 position data of Gunsan Port No. 1 light buoy where RTU was installed among western waters with the most position errors were DBSCAN clustered using Python library. The minPts required for DBSCAN Clustering applied the value commonly used for two-dimensional data. Epsilon was calculated and its value was applied using the k-NN (nearest neighbor) algorithm. As a result of DBSCAN Clustering, position error data that did not satisfy minPts and epsilon were detected and refined position data were acquired. This study can be used as asic data for obtaining reliable position data of a light buoy installed with AIS or RTU for AtoN. It is expected to be of great help in preventing navigation safety accidents.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.111-113
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• 2018

국제항로표지협회에서는 일정 규모이상의 해양의 양식장에는 (등)부표를 의무적으로 설치할 것을 권고하고 있다. 현재 사용되는 철제와 프라스틱 부표는 제작비용이 너무 고가로서 자발적인 설치가 어려운 실정이다. 그러므로 기존 부표보다 훨씬 저렴하면서도, 친환경적이면서도 내구성이나 기능이 뛰어난 부표를 개발하여 어민들에게 보급할 필요가 있다. 본 연구에서는 가벼우면서도 견고한 EPS(발포폴리스티렌, 고밀도 스티로폼)를 내부재료로 사용하고, 외부에 폴리우레아를 충분한 두께로 도포한 등부표에 관한 연구를 하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.218-219
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• 2017

등부표는 태양광발전을 이용한 독립형 전력계통시스템으로 일사량과 표면온도에 의한 태양광 발전효율 저하에 따른 등명기 소등 또는 광력 미약으로 항로표지에 대한 신뢰성 확보에 대한 문제점이 발생하고 있다, 국내 충방전조절기는 표준규격서에 따라 개발되고 있으나 충전제어방식은 대부분 PWM 제어 방식을 적용하여 개발되고 있어 충방전조저릭의 전력 효율 향상 등의 성능 개선을 추진할 필요가 있다. 본 연구에서는 충방전조절기의 성능 개선을 위하여 충전효율을 향상시키고 자체소비전력을 저감하는 기술을 개발하였다.