• Journal of Navigation and Port Research
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• v.42 no.5
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• pp.323-330
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• 2018

The Korean e-Navigation system is a Korean approach to correspond with implementation of IMO e-Navigation. It provides five services, among them SV20 service, a ship remote monitoring system that collects and processes sensor information related to fire, navigation, and seakeeping performance safety. The system also detects abnormal conditions such as fires, capsizing, sinking, navigation equipment failure during navigation, and calculates the safety index and determines the emergency level. According to emergency level, it provides appropriate emergency response guidance for the onboard operator. The fire safety module is composed of three sub-modules; each module is the safety index sub-module, the emergency level determination sub-module and emergency response guidance sub-module. In this study, operational concept of the fire safety module in SV20 service is explained, and fire safety assessment factors are estimated, to calculate the fire safety index. Fire assessment factors included 'Fire detector position factor,' 'Smoke diffusion rate factor,' and 'Fire-fighting facilities factor.'

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.05a
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• pp.45-46
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• 2018

S2 module, which is one of the Korean type e-Navigation services, is a service concept that monitors the situation onboard and provides an emergency level determination and response guidance to the ship when an alarm occurs. S2 module is divided into fire/ seakeeping / navigation safety sub-module. In this paper, the concept of S2 service based on actual ship is explained through the response guidance case study of navigation safety module in case of abnormal condition in the passenger ship H.

• Journal of the Society of Naval Architects of Korea
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• v.60 no.6
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• pp.473-481
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• 2023

In this study, a simulation system was developed to verify autonomous navigation algorithm in complex maritime traffic areas. In particular, real-world maritime traffic scenario was applied by considering near real-time maritime traffic information provided by Korean e-Navigation service. For this, a navigation simulation system of Unmanned Surface Vehicle (USV) was integrated with an e-Navigation equipment, called Electronic Chart System (ECS). To verify autonomous navigation algorithm in the simulation system, initial conditions including initial position of an own ship and a set of paths for the ship to follow are assigned by an operator. Then, considering real-world maritime traffic information obtained from the service, the simulation is implemented in which the ship repeatedly travels by avoiding surrounding obstacles (e.g., approaching ships). In this paper, the developed simulation system and its application on verification of the autonomous navigation algorithm in complex maritime traffic areas are introduced.

• Journal of Positioning, Navigation, and Timing
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• v.2 no.2
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• pp.101-108
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• 2013

GPS is the most widely-used Positioning, Navigation, and Timing (PNT) system. Since GPS is an important PNT infrastructure, the vulnerability of GPS to signal jamming has received significant attention. Especially, South Korea has experienced intentional high-power jamming from North Korea for the past three years, and thus realized the necessity of a complementary PNT system. South Korea recently decided to deploy a high-power terrestrial navigation system, eLoran, as a complementary PNT system. According to the plan, the initial operational capability of the Korean eLoran system is expected by 2016, and the full operational capability is expected by 2018. As a necessary research tool to support the Korean eLoran program, an eLoran performance simulation tool for Korea is under development. In this paper, the received signal strength, which is necessary to simulate eLoran performance, from the suggested Korean eLoran transmitters is simulated with the consideration of effective ground conductivities over Korea. Then, eLoran signal-to-noise ratios are also simulated based on atmospheric noise data over Korea. This basic simulation tool will be expanded to estimate the navigation performance (e.g., accuracy, integrity, continuity, and availability) of the Korean eLoran system.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.10a
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• pp.144-145
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• 2010

VTM is regarded as a core element in e-Navigation under developing by IMO. IMO's e-Navigation aims for VTM which could provide more navigational information for ships and provide more active VTS services for safe and efficient marine traffic environment. To be successful for VTM under e-Navigation, VTS operator's experience and ability for carrying out VTM tasks are essential. In this study, Decision-making support system for VTS operators are designed conceptually which support VTS operators' VTM tasks by providing informations on traffic risk, and predicted behaviour of ships. This paper describes a designed system with design concept, main functions, main elements and necessary technologies to be developed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.10a
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• pp.7-8
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• 2015

In MSC $95^{th}$ commitee, the Guideline on software quality assurance and human-centred design for e-navigation was approved as a circular. After that, the practical guidance to apply the guidance for marine-industry is developing. This guidance presents detailed actions which is done with the software development life-cycle and it provides templates of basic outcomes of the detailed actions. In April 2015, the "e-navigation SQA and HCD Guideline Workshop 2015" was held. There was discussions about the improvement and application plans of the guideline. Also, various opinions of marine-industry about IMO SQA were gathered and how to apply to the marine-industry with harmonization of SQA and HCD was discussed. This paper subscribes the future work to improve the guideline discussed on the workshop.

• Journal of Institute of Control, Robotics and Systems
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• v.17 no.9
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• pp.941-946
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• 2011

The Loran-C, a radio navigation system based on TDOA measurements is enhanced to eLoran using TOA measurements instead of TDOA measurements. Many error factors such as PF, SF, ASF, clock errors and unknown biases are included in eLoran TOA measurements. Because these error factors can cause failure in eLoran navigation algorithm, these errors must be compensated for high accuracy eLoran navigation results. Compensation of ASF and unknown biases are difficult to calculate, while the others such as PF and SF are relatively easy to eliminate. In order to compensate all errors in eLoran TOA measurements, a simple GPS aided bias compensation method is suggested in this paper. This method calculates the bias as the difference of TOA measurement and the range between eLoran transmitters and the receiver whose position is determined using GPS. The real data measured in Europe are used for verification of suggested method and navigation algorithm.

• Journal of Navigation and Port Research
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• v.36 no.1
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• pp.1-7
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• 2012

A concept of the "e-Navigation" was introduced in 2005 and implementation strategies are under way by IMO/IALA in the maritime safety area. Specially VTS is an important maritime traffic monitoring and aids to navigation system which is aims to improve safety, navigation efficiency and protect the marine environment. The demand of the inter-VTS networking has been increased and standardization is underway for realization of shore side collaboration for maritime safety in IALA. But there may be security problems in the inter-VTS networks if they have not proper security mechanism. The hacking of realtime ship position and sensitive maritime surveillance information caused a critical accident of vessel, human life and environment by terrorist. This paper aims to design of a secure inter-VTS network structure and related security protocol for secure sharing of sensitive maritime data.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.35-37
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• 2016

최근 IMO에서는 e-Navigation IT서비스를 사용자 입장에서 평가하도록 인간중심설계(HCD, Human Centered Design) 활동에 기반을 둔 유용성 평가에 대하여 표준화 작업을 진행하고 있다. 만약 IT서비스를 유용성 평가 기법으로 수행한다면 문제점, 오류, 개선사항, 사용자 요구사항 등을 도출할 수 있다. 그러나 IT서비스에 대한 유용성 평가의 관련 연구는 거의 진행되지 않고 있다. 이유는 최근 국제표준 제정을 준비하고 있고 평가를 위한 도구 및 평가 척도, 방법에 대한 기준이 명확하지 않기 때문이다. 따라서 본 연구에서는 경로 계획 공유(Route Plan Exchange) e-Navigation IT서비스에 대하여 유용성 평가 과정을 수행하였다. 유용성 평가를 위해 평가도구, 평가 시나리오, 평가 척도, 평가 방법을 개발하고 항해사 대상으로 유효성(Effectiveness), 효율성(Efficiency), 만족성(Satisfaction)을 평가하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.364-365
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• 2018

선박의 안전운항을 위해 해양기상 및 수로환경정보는 필수정보로서 현재 Weather Fax나 수로서지를 통해 정보를 활용하고 있다. e-Navigation 전략이행계획에는 해사서비스목록(MSP)을 정의 하였으며, 해양기상 및 수로환경정보를 전자 데이터로 서비스 하기 위해 서비스 개념과 기술 사양을 개발 중이다. 한국형 e-Navigation 서비스 개발 연구에서는 기상청과 국립해양조사원에서 생산하는 데이터를 이용하고 S-100 기반의 국제표준에 따른 데이터 서비스 기술을 개발하고 있다. 본 연구에서는 한국형 e-Navigation 서비스 아키텍처와 개발 기술을 기반으로 해양기상 및 수로환경정보 서비스 운영 개념을 설계 하였다.