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Split, Croatia

Kasum J.,Zrinsko Frankopanska 38 | Cvjetkovic S.J.,University of Professional Studies | Stanivuk T.,Zrinsko Frankopanska 38
Brodogradnja | Year: 2013

Very High Frequency (VHF) range covers the range of radio frequency electromagnetic waves from 156 MHz to 162.025 MHz. Marine VHF communication devices have a wide application in navigation onboard convention and non-convention vessels. VHF communication is also partly used in inland waterways, rivers, and lakes. The varied application of the VHF technology implies performing regular and emergency communication during the operation of various services that ensure the safe flow of navigation process by exchanging Maritime Safety Information (MSI). As for their construction and design, marine VHF equipment may be classified as portable and stationary. Regulations provided by local registers of shipping apply to their technical features and design requirements in case of new-built vessels or subsequent fitting of the vessels with such equipment. Although these regulations go into details as they refer to the design and the exploitation of vessels, it can be noticed that they are not sufficiently elaborated in the area of using VHF marine communication devices in dynamic conditions. This paper discusses the impact of dynamic conditions on the range of marine VHF equipment and the development of feasible improvements onboard various types of vessels. Source


Vidan P.,Zrinsko Frankopanska 38 | Kezic D.,Zrinsko Frankopanska 38 | Gudelj A.,Zrinsko Frankopanska 38
Brodogradnja | Year: 2013

Automation of navigation at sea has partly been provided for with the use of integrated navigation bridge - INB. The functioning of INB is supervised by the officer who also takes the final decision during navigation. The complete automation of navigation can be improved by upgrading the existing equipment on board modern ships. To provide for automation of inland navigation all the necessary infrastructure can be installed in the immediate vicinity of the ship. Such an infrastructure includes special transmitters, receivers and measuring instruments networked with the ship's instruments. From that aspect, limitedness of waterways is considered to be their advantage. Ship's navigation can be managed by a system of networked computers containing programs required for conducting a ship. In this paper the authors use continuous Petri nets for modelling and simulation of ships' navigation through a system of locks without queuing. Source

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