• Title/Summary/Keyword: Safe Navigation

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Path Planning Using an Information Grid Map for Safe Navigation (안전한 주행을 위한 정보 격자지도 기반의 경로계획)

  • Jung, Min-Kuk;Park, Joong-Tae;Song, Jae-Bok
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.6
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    • pp.623-628
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    • 2012
  • Conventional path planning methods have focused on the generation of an optimal shortest path to the goal. However, this optimal path cannot guarantee safe navigation, because it can often lead to a narrow area. Therefore, we propose a Coulomb's law-based safe path planning method that uses an information grid map. The information grid map includes four types of information: occupied, empty, guide, and dangerous areas. A safe path can be generated away from the dangerous area and close to the guide area by repulsive and attractive forces, respectively. Experiments and simulations show that the proposed method can generate paths inside the safe region and is useful for safe navigation.

The Role am Evolution of Traditional Aids to Navigation in an e-Navigation era (e-Navigation 시대를 향한 기존 항로표지의 역할 및 진화)

  • Jeong, Jong-Kwon
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2010.04a
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    • pp.473-480
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    • 2010
  • A key objective is to meet the requirements for safe marine transport and protection of the marine environment by providing a comprehensive mix of Aids to Navigation commensurate with the amount of traffic and the degree of risk. The development of e-Navigation is driven by the compelling need to equip the master of a vessel and those ashore responsible for the safety of shipping with modem, proven tools to improve the reliability of marine navigation and communications. Although position fixing using GNSS is widely used, radar and visual AtoNs continue to be needed to provide safe, secure and environmentally clean navigation. The paper considers the role, evolution and future provision of traditional aids to navigation in an e-Navigation environment from both a technical and mariner perspective.

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Interaction between Navigation Officer and SCMS for Ship Control and Safe Navigation (선박조종과 안전항해를 위한 항해사와 SCMS의 상호작용)

  • Kim, Bi-A;Lee, Jae-Sik;Kim, Jong-Do;Oh, Jin-Seok
    • Journal of Navigation and Port Research
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    • v.30 no.10 s.116
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    • pp.833-837
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    • 2006
  • Effective interaction between navigation officer and automated navigation-support system is essential for ship-handling and safe navigation In this study, the functions of the SCMS(Ship Control and Management System) which was developed and implemented to support navigation officer's ship control and to guide safe navigation were described in terms of navigation officer's tasks(i.e., watchkeeping, positioning, and maneuvering), and the interactive relationship between navigation office and the system were analyzed in addition, the effectiveness of the system was evaluated in the scope of training efficiency and subjectively rated safety level.

A Study on the Development of Educational Modules for Aids to Navigation Using the Aid to Navigation Simulator (항로표지 시뮬레이션 시스템을 활용한 항로표지 교육모듈 개발에 관한 연구)

  • Jeong, Woo-Lee;Jo, Gi-Jong;Moon, Serng-Bae
    • Journal of Navigation and Port Research
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    • v.43 no.6
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    • pp.361-368
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    • 2019
  • Aid to Navigation (AtoN) is the artificial facilities to facilitate the ship's safe navigation using light, shape, color, sound, and radio waves. IALA has developed and operated the educational course for expert groups for the design, deployment, and management of AtoN. Also, maritime educational institutes have operated various educational courses for safe navigation through the ship's operation and ECDIS curriculum for seafarers. However, education using the AtoN Simulator System is needed to prevent marine accidents caused by misunderstanding of the AtoN according to various topographical, environmental, and maritime traffic environments. In this study, the existing ship handling simulator and AtoN simulator were applied to develop educational modules for accurate understanding and application of AtoN in various environments, enhancing the quality of education from the existing theoretical point of view and improving practical use to maximize educational efforts.

A Study on Ship-handling Difficulty in Bend Channels (조선환경스트레스 모델을 이용한 편도항로 만곡부에서의 선박조종 난이도 평가에 관한 연구)

  • 나상각;문채식;윤명오;금종수;노창균
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.9 no.1
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    • pp.57-63
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    • 2003
  • Marine traffic system is composed of ship, ship's operators and traffic environment The navigation channel is a part of traffic environment and the design of channel is a crucial factor for safe navigation This paper aims to evaluate ship-handling difficulty in straight and bend channels with an Environmental Stress model(ES-model). The ES-model is used to evaluate ship handling difficulty quantitatively on the basis of the ship operator's subjective judgement for safety in navigation The calculation of ES value was made on the basis of three factors such as channel width, ship's length and speed in straight and channels for safe navigation. The interrelation between factors was analyzed and reasonable design standards of channel width, ship's length and speed were proposed for safe navigation of ship in bend channel.

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Safe Navigation Plan for Dredging Operations to build Sunken Tunnel for Access Road between Busan-Geoje (부산-거제간 연결도로 침매터널공사의 준설작업에 따른 안전통항방안)

  • Kim, Jung-Hoon;Gug, Seung-Gi
    • Journal of Navigation and Port Research
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    • v.30 no.10 s.116
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    • pp.825-831
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    • 2006
  • This research does by purpose that present safe navigation plan for ships during doing dredging construction with dredger crossing waterway of Gadeok Dredging operations need to build sunken tunnel that cross the bottom of the sea under waterway of Gadeok for access road construction between Busan- Geoje. Accordingly, dredger must cross and dredge waterway of Gadeok fatally. There is possibility of marine accident of collision for latent danger situation of ships to navigate waterway of Gadeok relatively. Therefore, safe navigation plan of ship is groped in reply and its countermeasure is presented. Firstly, navigating traffic in daytime was forecasted less than 20% of its maximum capacity through estimating the traffic volume and traffic congestion The proposal was presented to execute dredging operations in three-step and to establish temporary waterway after reviewing waterway design principles. The role of VTS center was emphasized in the new Busan Port, lastly.

A Study on the Approaching Distance in Taking Action to Avoid Collision (피항동작시의 한계접근거이에 관한 연구)

  • 윤점동;박선규
    • Journal of the Korean Institute of Navigation
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    • v.6 no.1
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    • pp.41-59
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    • 1982
  • In the Sailing Rules of International Regulation for Preventing Collisions at Sea, 1972, any definite distance between two vessels approaching each other is not referred for adequate maneuvering to avoid collision. At sea the officer in charge of bridge duty is required to guess safe distance before he takes maneuvering actions needed to avoid collision. Papers on safe distances calculated on the base of the motiional characteristics of ships for collision avoiding actions are very few. In this paper, the minimum safe approaching distances necessary for actions to be taken to avoid collision are calculated in numerical numbers definitely by mathematic formula based on the maneuvering indices got from experiments of actual ships. On the assumption that two vessels same in size and conditions are approaching each other, the author calculated the minimum safe approaching distance as 4.5 times, sufficient safe approaching one as 9.0 times the length of the ship involved in head-on situation and 5.0 times, 10 times respectively the length of the ship in each case mentioned above in crossing situation.

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A Study on the Method of Safe Shiphandling in Violently Rough Sea by Typoon or Hurricane

  • Lee, Chun-Ki
    • Journal of Navigation and Port Research
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    • v.34 no.2
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    • pp.123-129
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    • 2010
  • The object of this study is to develop the method of safe conducting of a vessel through stormy sea when we encounter typoon or hurricane on ocean. The scope of investigation in this paper will be limited to safe maneuvering related only with rolling motions of a vessel. The processes of investigations are as follows; Firstly, we decide a CPA(Closest Point of Approach) with the center of the storm and decide significant wave height($H_{1/3}$) by SMB method and then calculate wave height of the highest of 1000 waves($H_{1/1000}$) and other data. Secondly, we make mathematical model of rolling motions of the vessel on the stormy sea and calculate the biggest rolling angle of the vessel and etc. Thirdly, we decide the most safe maneuvering method to ride out the stormy sea. By the above mentioned method we are able to calculate the status of the stormy sea and ships motions to be encountered and ride out safely through violently rough sea.