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    Wyświetlanie 1-8 z 8
    Tytuł:
    Propagation models for the Radiocommunication Event Management System (REMS) in the V-band
    Autorzy:
    Mąka, Marcin
    Majzner, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/135635.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    radiocommunication
    Radiocommunication Events Management System (REMS)
    Global Maritime Distress and Safety System (GMDSS)
    propagation
    model
    ranges of v-band
    Opis:
    This paper presents an analytical method for determining marine VHF communication bands based on the propagation model included in the International Telecommunication Union (ITU) recommendations. The developed method to determine communication bands was compared with the model recommended by the International Maritime Organization (IMO). The usefulness of the method developed by the authors has been demonstrated for the needs of the Radiocommunication Events Management System (REMS).
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 58 (130); 55-60
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ways to improve radiotelephone procedures training for the navy
    Autorzy:
    Nikolov, Zh.
    Powiązania:
    https://bibliotekanauki.pl/articles/117195.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    communication
    Global Maritime Distress and Safety System (GMDSS)
    radiotelephone
    radiotelephone procedures
    radiotelephone procedures training
    MET System in Bulgaria
    Bulgarian Naval Academy
    Navy
    Opis:
    Every type of training can be improved. Trying to find ways to do so is a continuous process. The identification and implementation of the most effective of those can only be adequate to the changing environment in case of objective review, comparison and analysis. This paper discusses some approaches whose adoption can lead to the enhancement of the training for radio operators for working in tactical net-works for the Navy. It also shares some experience from the implementation of such methods when training cadets at the Bulgarian Naval Academy.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 181-183
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The issues of maritime radiocommunication on the WRC-19
    Autorzy:
    Korcz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/117284.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Maritime Communication
    Maritime Radiocommunication
    World Radiocommunication Conference (WRC),
    Global Maritime Distress and Safety System (GMDSS)
    Information and Communication Technology (ICT)
    Radio Regulations (RR)
    International Telecommunication Union (ITU)
    VHF Data Exchange System (VDES)
    Opis:
    The article presents maritime radio communication issues being the subject of the World Radiocommunication Conference (WRC) meeting in 2019, including issues related to the modernization of Global Maritime Distress and Safety System (GMDSS). The preparation process for WRC-19 have been presented. The discussed issues were described from the substantive side as well. Finally, the position of IMO in relation to the maritime issues have been discussed. Some aspects of the World Radiocommunication Conference meeting in 2023 (WRC-23) were also presented.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 597-604
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of telexistence on a ship by using satellite communication
    Autorzy:
    Sasaki, S.
    Okazaki, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/117499.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    communication
    Global Maritime Distress and Safety System (GMDSS)
    Satellite Communications
    one person bridge operation
    telexistence
    telexistence on a ship
    remote maneuvering system
    unmanned ship
    Opis:
    Nowadays shipping industry has problems such as reduction of mariners, aging of mariners, and labor expenses. To solve the problems, One Person Bridge Operation was developed as navigation supporting system. However, One Person Bridge Operation remained technological problems and one man error. Therefore, in this study, telexistence on a ship was proposed by using satellite communication. Telexistence on a ship is a concept of maneuvering between land and ship with at least two mariners such as navigation officer and helmsman. Navigation officer works on ship as usual and helmsman supports ship from land. In this paper, remote maneuvering system was developed as the first step of telexistence on a ship. For evaluating the effectiveness, ship experiment was carried out. From the result, navigation officer and helmsman could alter ship’s course to 20 degrees within 60 seconds and less than 5% overshoot in the proposed remote maneuvering system.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 175-180
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some aspects of the modernization plan for the GMDSS
    Autorzy:
    Korcz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/116379.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Maritime Distress and Safety System (GMDSS)
    communication
    Modernization Plan for the GMDSS
    e-Navigation
    Navigational Data (NAVDAT)
    Automatic Link Establishment (ALE)
    SOLAS Convention
    Radiocommunication
    Opis:
    Preliminary Modernization Plan for the Global Maritime Distress and Safety System (GMDSS) have been presented. On the base of a current status of the GMDSS and the discussion on a modernization topic some aspects of the Modernization Plan for the GMDSS, both regulatory and technical nature, have been described. Future work on the Modernization Plan for the GMDSS have been discussed as well.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 167-174
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New learning methods for marine oil spill response training
    Autorzy:
    Halonen, J.
    Lanki, A.
    Rantavuo, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/117267.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    oil spill
    environmental protection
    new learning methods
    marine oil spill
    oil spill response training
    Regional Fire and Rescue Services (RFRS)
    MET System in Finland
    Global Maritime Distress and Safety System (GMDSS)
    Opis:
    In Finland the Regional Fire and Rescue Services (RFRS) are responsible for near shore oil spill response and shoreline cleanup operations. In addition, they assist in other types of maritime incidents, such as search and rescue operations and fire-fighting on board. These statutory assignments require the RFRS to have capability to act both on land and at sea. As maritime incidents occur infrequently, little routine has been established. In order to improve their performance in maritime operations, the RFRS are participating in a new oil spill training programme to be launched by South-Eastern Finland University of Applied Sciences. This training programme aims to utilize new educational methods; e-learning and simulator based training. In addition to fully exploiting the existing navigational bridge simulator, radio communication simulator and crisis management simulator, an entirely new simulator is developed. This simulator is designed to model the oil recovery process; recovery method, rate and volume in various conditions with different oil types. New simulator enables creation of a comprehensive training programme covering training tasks from a distress call to the completion of an oil spill response operation. Structure of the training programme, as well as the training objectives, are based on the findings from competence and education surveys conducted in spring 2016. In these results, a need for vessel maneuvering and navigation exercises together with actual response measures training were emphasized. Also additional training for maritime radio communication, GMDSS-emergency protocols and collaboration with maritime authorities were seemed important. This paper describes new approach to the maritime operations training designed for rescue authorities, a way of learning by doing, without mobilising the vessels at sea.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 339-345
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Propagation Characteristic of DGPS Correction Data Signal at Inland Sea - Propagation Characteristic on LF/MF Band Radio Wave
    Autorzy:
    Okuda, S.
    Toba, M.
    Arai, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/116409.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Maritime Distress and Safety System (GMDSS)
    Inland Sea
    Propagation Characteristic
    Differential Global Positioning System (DGPS)
    Radio Wave
    LF Band Radio Wave
    MF Band Radio Wave
    DGPS Correction Data Signal
    Opis:
    User at the Inland Sea requires high position accuracy which is 5 m (2drms) or less. Therefore the position accuracy of standalone GPS is insufficiency. Consequently it needs to use DGPS for navigator sailing the Inland Sea. We executed numerical simulation of the propagation characteristic on the extended line of bridge pier at opposite side from DGPS station, and already confirmed that bit error in DGPS correction data signal occurs, and that correction data could not form by bit error. Furthermore, we carried out numerical simulation of the propagation characteristic of DGPS correction data signal received at sailing through center of the bridge, and solved receiving condition of DGPS correction data signal before and after passing through the bridge. In this paper, we executed to inspect mutually results of electric field intensity simulation for oversea and overland propagation on some sea area of the Inland Sea and measuring results of electric field intensity for DGPS correction data signal, and evaluated the possibility of abnormal propagation comprehensively.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 549-554
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation of Multiple Access Techniques Applicable for Maritime Satellite Communications
    Autorzy:
    Ilcev, S. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/116635.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Maritime Distress and Safety System (GMDSS)
    Maritime Mobile Satellite Communications (MMSC)
    Multiple Access (MA)
    Multiple Access Techniques
    Code Division Multiple Access (CDMA)
    Time Division Multiple Access (TDMA)
    Frequency Division Multiple Access (FDMA)
    Random (Packet) Division Multiple Access (RDMA)
    Opis:
    In this paper are introduced fundamentals, characteristics, advantages and disadvantages of Multiple Access (MA) employed as transmission techniques in the Maritime Mobile Satellite Communications (MMSC) between ships and Coast Earth Station (CES) via Geostationary Earth Orbit (GEO) or Not-GEO satellite constellations. In fixed satellite communication, as a rule, especially in MMSC many users are active at the same time. The problem of simultaneous communications between many single or multipoint mobile satellite users can be solved by using MA technique, such as Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), Space Division Multiple Access (SDMA) and Random (Packet) Division Multiple Access (RDMA). Since the resources of the systems such as the transmitting power and the bandwidth are limited, it is advisable to use the channels with complete charge and to create a different MA to the channel. This generates a problem of summation and separation of signals in the transmission and reception parts, respectively. Deciding this problem consists in the development of orthogonal channels of transmission in order to divide signals from various users unambiguously on the reception part.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 529-540
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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