• Journal of Positioning, Navigation, and Timing
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• 제11권4호
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• pp.239-244
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• 2022

R-Mode is terrestrial based Global Navigation Satellite System (GNSS) backup radio navigation technology which used existing maritime information service infrastructure. It has advantages on reduce the cost and reutilize the frequency resource. In this paper, we propose a method to develop a medium-frequency (MF) band R-Mode transmitting station by utilizing the currently operating Differential GNSS (DGNSS) reference station infrastructure. To this end, the considerations for co-operating the DGNSS reference station and the MF R-Mode transmitting station are analyzed. In this process, we also analyze what is necessary to configure the communication system as a navigation system for range measurement. Based on the analysis result, MF R-Mode transmitting station system is designed and architecture is proposed. The developed system is installed in the field, and the performance evaluation results is presented.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 춘계학술대회
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• pp.415-416
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• 2022

Marine pilot occupational accidents during transfer to/from the ship are at the top of the agenda after several safety campaigns by IMPA and individual attemptsThere is multiple transfer method for the marine pilot, but a most common way is to use the pilot cutter. This paper aims to predict marine pilot occupational accidents before it occurs by using historical data. Since the problem depends on several variables, this paper develops a model by using the random forest method to predict marine pilot accidents before happening with the random forest method by using RStudio software

• Journal of Positioning, Navigation, and Timing
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• 제12권3호
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• pp.289-294
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• 2023

As technologies such as cameras, Laser Imaging, Detection, and Ranging (LiDAR), and Global Navigation Satellite Systems (GNSS) become more sophisticated and common, their use in autonomous driving technologies is being explored in various fields. In the maritime area, technologies related to collision avoidance between ships are being developed to evaluate and avoid the risk of collision between ships by setting various scenarios. However, the position of each vessel used in the process of developing collision avoidance technology between vessels uses data obtained through GNSS, and may include a position error of 10 m or more depending on the situation. In this paper, a study on the dynamic safety navigation range including the positional inaccuracy of the ship is conducted. By combining the concept of the protection level obtained using GNSS raw data with a conventional safe navigation range, a safer navigation range can be calculated for dynamic navigation. The calculated range is verified using data obtained while sailing in an actual sea environment.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2018년도 춘계학술대회
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• pp.45-46
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• 2018

한국형 e-Navigation 서비스 중 하나인 S2 모듈은 선내 상황을 모니터링 하고 이상 발생시 긴급레벨 판정 및 이에 따른 대응가이던스를 선박에 제공해주는 서비스 개념이다. S2 모듈은 화재/ 내항성/ 항행 안전 서브모듈로 구분되며, 본 논문에서는 여객선 H호의 선내이상 알람 발생시 항행안전모듈 대응가이던스 사례연구를 통해 실선기반의 S2 서비스 개념을 설명한다.

• Journal of Positioning, Navigation, and Timing
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• 제11권4호
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• pp.245-250
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• 2022

As location-based services using the Global Navigation Satellite System (GNSS) are diversified, concerns about the vulnerability of GNSS to radio disturbance and deception are also growing. Accordingly, countries that own and operate GNSS, such as the United States, Russia, and Europe, are also developing additional navigation systems that can compensate for GNSS' weaknesses. Among them, an R-Mode system that transmits navigation signals using an infrastructure that transmits differential GNSS (DGNSS) information using signals from the medium frequency band currently in operation is being developed in Europe and Korea. Since 2020, Korea has improved four DGNSS transmission stations, including Chungju, Eocheongdo, Palmido, and Socheongdo, to transmit R-Mode signals and test navigation performance in some parts of the West Sea. In this paper, we intend to establish a testbed for measuring the distance of R-Mode signals currently being transmitted and analyze the results. It is confirmed that the distance measurement performance varies depending on the antenna type, diurnal variation, and propagation path of the signal.

• 대한인간공학회지
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• 제20권2호
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• pp.99-111
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• 2001

Human factors is a key issue in the maritime industry including ship design and navigation safety. Human factors for ship design is to optimize safety and convenience of crews and passengers. And human factors for navigation safety is to minimize marine accident occurrence by human and organizational error. There are several technical requirements to incorporate human factors and marine system Risk analysis. human behaviour analysis and human M&S(modeling and simulation) are examples of technical requirements. This paper provides the key issues and technologies of human factors for ship design and navigation safety.

• 해양환경안전학회지
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• 제21권2호
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• pp.164-170
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• 2015

본 연구에서는 연안 선박과 소형 어선의 안전관리 개선을 위해 한국형 e-navigation을 활용하여 기존의 해상교통관리체계를 개선할 수 있는 방안을 제시하였다. 시스템적인 측면과 기능적인 측면에서 기존 해상교통관제(VTS)의 고도화방안을 제시하였고, 해양안전종합정보시스템(GICOMS)를 기반으로 한 통합 e-navigation 운영시스템의 구성도와 해역별 해상교통관리체계의 운영방안을 제시하였다. 특히, 연안에서의 소형 선박과 어선에 대한 해상교통관리 강화를 위하여 해사클라우드 기반의 선박-선박/육상 간 데이터통신방안과 지역별 해사안전지원센터의 설치를 제안하였다. 본 연구가 연안선박과 소형어선에 중점을 둔 한국형 e-navigation의 추진에 도움이 될것으로 보며, 향후 e-navigation을 활용한 해양사고예방시스템의 개발과 운영 등에 관한 후속연구가 필요하다고 본다.

• 한국항행학회논문지
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• 제20권2호
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• pp.141-147
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• 2016

항행안전시설에서 제공되는 항행정보의 서비스를 지속적으로 향상시켜 공항 운영 경쟁력 증진과 항행정보 이용자인 항공기 조종사, 항공교통관제사, 항공사, 및 일반인에게 안정성과 신뢰성 있는 항행정보 서비스 제공이 필요하다. 항행시설 안전성숙도 평가(ASMS; ANSP safety maturity survey)는 항행안전시설 분야의 조직 경영, 안전과 위험관리, 정책 기준 절차관리, 교육훈련 및 근무환경 등 유지관리 및 안전관리 필수요건들이 어느 수준까지 충족하는지를 평가하는 체계이다. 동 평가개발의 추진방침은 국제운영 우수사례 (Eurocontrol, FAA) 등 안전성숙도 평가모델 분석기법을 벤치마킹하여 국내 항행시설 평가체계 분야에 적용하고, 항행시설 유지관리 및 안전도의 계량적인 수준 측정을 위한 핵심 구성요소 발굴을 통해 유지관리(management) 분야의 26개 평가항목 및 안전관리(safety) 분야의 23개 평가항목으로 구성된 평가모델을 개발하였다. 항행시설 안전성숙도평가를 통해 항행안전시설의 성능개선 및 안전사고 예방은 물론 각종 서비스 향상을 유도하여, 이용자에게는 최상의 항행정보를 제공하기 위한 것이다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 공동학술발표회
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• pp.96-96
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• 2017