Coast NAVTEX information broadcast monitoring system

Abstract

The invention discloses a coast NAVTEX information broadcast monitoring system, which comprises a coast radio station central console monitoring terminal and reception monitoring terminals arranged at monitoring points around a coast radio station. The reception monitoring terminals are arranged at the monitoring points around the coast radio station within a range of 200-500 KM; and the coast radio station central console monitoring terminal collects NAVTEX messages received by the monitoring points, horizontally and vertically compares the received information data in space and time, carries out analysis and statistics of reception and emission error rate, and allows NAVTEX navigation warning information broadcast problems to be found in time so as to adjust a coastal station NAVTEX transmitter deployment strategy, thereby ensuring that ships within a coastal station NAVTEX coverage area receive navigational warning information in time, providing maritime safety information service for ships at home and abroad better and ensuring life and property safety of ships and crews.

Description

technical field [0001] The invention relates to the technical field of marine safety equipment, in particular to a Neftes information dissemination monitoring system for coasts. Background technique [0002] NAVTEX (Navtex)----Navigation Telex system is a marine safety information such as navigation warning, weather warning, weather forecast and emergency information broadcast by coast stations through narrowband direct printing (NBDP) technology and automatically received by ships system. The NAVTEX system consists of the onshore MSI provider, the NAVTEX broadcasting station and the marine NAVTEX receiver. According to IMO International Maritime Organization's equipment requirements for Global Maritime Distress and Safety System - GMDSS equipment, ships at sea must be equipped with NAVTEX receivers to automatically receive and print maritime safety information broadcast by coast stations in sailing sea areas. [0003] In recent years, with the increase of international tr...

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Problems solved by technology

[0003] In recent years, with the increase of international trade, the annual inspection of GMDSS--Global Maritime Distress and Safety System medium-frequency single-sideband communication and DSC-digital selective calling signal is also frequent. Due to the similar frequency, these signals are very important for the broadcasting of NAVTEX maritime safety information. It often causes interference; at the same time, because the high noise level of the atmosphere limits the coverage of information sent on the intermediate frequency band, the reception effect of NAVTEX signals is significantly affected by the time of day and night, weather and seasons

[0004] The above factors will cause some sailing ships to be unable to receive the navigation information in the sea area in time, whether the coverage distance of the message meets the duty performance requirements of the coast station, whether the communication signal is good within the coverage area, whether the message is received properly, and the bit error rate. The reason is that it is difficult to collect information about these situations at present. There are only a few on-board test data and lack of long-term monitoring data, which brings hidden dangers to navigation safety.

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