• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.455-457
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• 2012

우리나라를 비롯한 전 세계의 최근 물동량 증가로 우리나라 항만에 입출항 척수가 지속적으로 증가하고 있다. 이로 인해 연안 해역뿐만 아니라 원양 해역에서도 선박간의 조우 상황이 다수 발생하고 있으며, 특히 국내 연안 해역은 빈번한 선박 조우로 인한 해양사고 발생이 상당히 빈번하게 발생하고 있는 실정이다. 이에 따라 본 연구에서는 선박 및 해양 관련 업무 종사자들의 인적과실로 인한 해양사고를 예방하고, 해기인력의 질 향상을 위한 기초연구에 그 목적이 있다. 또한 이 연구를 통하여 해기인력의 해양사고예방을 위한 기존 시스템의 하드웨어 및 소프트웨어적인 측면에서 미흡한 부분을 보완하는 자료로 활용하고, 해기인력의 운항능력향상에 중점을 둔 기존 IT기반 시뮬레이터의 문제점과 개선 방안 등을 기초로 향후 해양사고 예방용 통합 시뮬레이션 개발의 주요자료로 활용할 수 있을 것이다.

• Journal of Navigation and Port Research
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• v.40 no.4
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• pp.183-188
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• 2016

Many maritime accidents have been caused by human-error including such things as inadequate watch keeping and/or mistakes in ship handling. Also, new navigational equipment has been developed using IT technology to provide various information for safe navigation. Despite these efforts, the reduction of maritime accidents has not occurred to the degree expected because, navigational equipment provides too much information, and this information is not well organized, such that users feel it to be complicated rather than helpful. In this point of view, the method of representation of navigational information is more important than the quantity of that information and research is required on the representation of information to make that information more easily understood and to allow decisions to be made correctly and promptly. In this paper, we adopt Augmented Reality (AR) technologies for the representation of information. AR is a 3D computer graphics technology that blends virtual reality and the real world. Recently, this technology has been widely applied in our daily lives because it can provide information more effectively to users. Therefore, we propose a new concept, a navigational system based on AR technology; we review experimental results from a ship-handling simulator and from an open sea test to verify the efficiency of the proposed system.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.173-174
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• 2020

해양 공간 개발과 신개념 선박이 출현함에 따라 해상교통 환경은 복잡해지고 있으며, 이에 해양안전을 확보하기 위한 다각적인 대비책이 마련되어야 한다. 특히, 선박운항 시뮬레이터 및 과거 항적 데이터를 이용한 기존의 해상교통안전진단체계는 이러한 교통 환경의 변화를 반영하지 못하기 때문에 분석에 한계가 존재한다. 동적인 해상교통 환경에 적합한 시뮬레이션 기반 분석 방법이 개발되어야 하며, 이를 위해 본 논문에서는 에이전트 개념을 기반으로 하는 모델링-시뮬레이션(M&S) 플랫폼을 제안하고자 한다.

• Journal of the Korean Society for Marine Environment & Energy
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• v.5 no.3
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• pp.28-34
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• 2002

As the technology of Speech Recognition(SR) and Text-To-Speech(TTS) develops rapidly, voice control and guidance system is thought to be very helpful for safe navigation. But Voice Control and Guidance System(VCGS) is not yet so popularly included in Navigation Supporting System(NSS). The main reason of this is that VCGS is so complicated and user-unfriendly that navigation officers hesitate to use VCGS. Frequent errors in operating VCGS due to low rate of SR are another reason. To make VCGS more practicable for safe navigation, we design the user-friendly VCGS. Firstly, by using interviews we survey functions and procedures that navigation officers want to be included in VCGS. Secondly, to raise the rate of SR, we tun the environmental noise in bridge and to reduce the errors due to low rate of SR in operating VCGS, we design the functions of self-correction. Also we apply a user-independent SR engine so that procedures of teaming of speakers is basically not necessary. Using simulator experiments the functions and procedures of the user-friendly YCGS for safe navigation are evaluated and the results of evaluation are fed back to the design. As a result, we can design the VCGS more helpful for safe navigation. In this paper, we describe the features of the user-friendly VCGS for safe navigation and discuss the results of simulator experiments.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.200-201
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• 2023

Digital twin technology is used in various fields as a method of creating a virtual world to minimize the cost of solving problems in the real world, and is also actively used in the maritime field, such as large-scale systems such as ships and offshore plants. In this paper, we tried to build a digital twin of coastal waters using a ship-handling simulator. The digital twin of the coastal waters developed in this way can be used to safely manage Korea's coastal waters, where maritime traffic is complicated, by providing a actual maritime traffic data. It can be usefully used to develop and advance technologies related to maritime autonomous surface ships and intelligent maritime traffic information services in coastal waters. In addition, it can be used as a 3D-based monitoring equipment for areas where physical monitoring is difficult but real-time maritime traffic monitoring is necessary, and can provide functions to safely manage maritime traffic situations such as aerial views of ports/control areas, bridge views/blind sector views of ships in operation.

• Journal of Navigation and Port Research
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• v.39 no.6
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• pp.465-472
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• 2015

SEEMP (Ship Energy Efficiency Management Plan) guidelines for a ship's GHG reduction include a machinery modification of hull, an installation of energy efficiency enhanced attachment in hardware methods. It is also possible to bring a ship energy efficiency improvement by fuel-efficient operations or in other software methods. Hardware modification or installation on ship can bring financial burdens to a ship company compared to its improvement expectation. On the other hand, Software based energy-saving technology can be applicable on various ship types, and it is also expected high efficiency of ship energy use compared to hardware based technology in perspective of the investment costs and efficiency. In this paper, it is described that the ship handling simulator based evaluation was carried out using representative ship model of bulk, container and VLCC. Simulation environments were separated into 6 conditions according to the sea-state and weather condition, and the operation results were compared with those before and after energy saving system applied The container ship showed the largest FOC save rate after energy saving system applied although the others also showed energy save rate after using the system.

• Journal of Navigation and Port Research
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• v.47 no.6
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• pp.386-393
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• 2023

Recently, the demand for autonomous navigation technology has increased, and related research is also increasing. Autonomous ships generally follow the planned route, calculate the avoidance route according to the risk situation while sailing, and follow a calculated route. In general, an automatic steering device is used to follow the route, and among the operational automatic steering device methods, the route control mode is the most appropriate method to apply to autonomous ships. Therefore, in this study, we developed a route-tracking algorithm to apply an avoidance route using the navigation control mode of an automatic steering device. The algorithm was developed by dividing the straight and turning sections. A performance test was conducted to satisfy the performance suggested by IEC 62065, the relevant international standard, using simulator equipment that had acquired international certification to verify its performance. The results of the performance verification confirmed that the cross-track error, which represents the straight distance between the ship and the route, satisfied the performance standards suggested by IEC 62065 when the ship followed the route.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.377-379
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• 2013

우리나라 항만 입출항 통항 선박의 대형화, 고속화에 따른 해양안전사고가 증가하고 있어 항만 연안 해역에서의 해상교통안전 확보가 절실히 요구되고 있는 실정으로, 최근 국제항로표지협회(IALA)에서 항로표지 설계와 배치계획에 대한 의사결정을 지원할 수 있는 항로표지 전문 기능 시뮬레이터의 개발과 주요 항로의 항로표지 설계 및 계획 등을 검증할 수 있는 시스템 필요성을 제기하였다. 우리나라 주요 항로의 항로표지 설계와 적정 배치 여부 등을 검증하고 보완할 수 있는 시뮬레이션 시스템이 필요하며 3차원 가상현실 기법을 이용하여 항로표지의 신설 및 이설에 따른 여러 가지 효과를 직관적으로 파악하고 대상 해역의 특성이 고려된 다양한 해상교통 환경 변화에 따른 항로표지의 신설 및 이설 효과를 선박 운항자 관점에서 검증하거나, 새로운 항만 항로 건설시 최적 항로표지 배치에 대한 의사결정을 지원하기 위한 항로표지용 시뮬레이터 시스템 개발이 진행되고 있다. 이러한 항로표지 시뮬레이터 개발에 필요한 항로표지 관련 3D 모델링의 구현 방법과 종류에 대하여 기술하였다.

• Journal of the Society of Naval Architects of Korea
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• v.60 no.6
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• pp.406-415
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• 2023

In this study, we focused on developing and verifying ship collision avoidance algorithms using Unity simulator and ROS(Robot Operating System). ROS is used to establish an environment where communication between different operating systems is possible, and a dynamic model of a ship is constructed within Unity simulator. The Lidar data collected in Unity environment is passed to the system based on python through ROS. In the system based on python, control command values were created through the logic of the collision avoidance algorithm using data, and the values were transferred back to Unity to control the movement of the virtual ship. Through the developed simulation system, the reliability of the collision avoidance algorithm of ships with two different forms in an environment similar to the actual physical world was confirmed. As a result, it was confirmed on the simulator that it could be avoided without collision even in an environment with various types of obstacles, and that the avoidance characteristics according to the dynamics of the ship could be analyzed.

• Proceedings of the Korea Society for Simulation Conference
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• 2002.11a
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• pp.41-46
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• 2002

이 연구는 기존 VTS 시스템의 효율성을 증대시키기 위해 VTS 시스템에 선박조종 시뮬레이터를 기능적으로 연계시켜 VTS 시스템을 3차원으로 확장시키고자 시도된 것이다. 기존의 VTS 시스템은 ARPA Radar를 이용한 2차원에 국한된 관제 시스템이나 이 시스템에 분산처리 네트워크방식을 적용하여 3차원 기능을 가진 VTS 시스템으로의 확장이 가능하도록 하였다. 이러한 확장된 VTS 시스템의 운용은 선박의 안전운항에 큰 역할을 할 수 있을 것으로 기대된다.