免费 船舶 信息系统 AIS for ships in the future.pdf

AIS for ships in the future AUTOMATIC IDENTIFICATION SYSTEM Introduction Regina C=076 Automatic Identification System (AIS) is a technical system S=14.8 that makes it possible to monitor ships from other ships, and from shore based stations. AIS is a requirement. (see Interna- tional standardisation below). AIS-equipped ships continu- ously transmit a short message containing information of posi- tion, course over ground (COG), speed over ground (SOG), gyro course (heading), etc. Ships equipped with AIS meeting anywhere on earth will be able to identify and track each other without being dependent of shore stations. Shore stations will also get the same information from AIS-ships” within the VHF area of the station when moni- “ toring the coastal areas and the ports. The AIS is using a broadcast and an interrogating self organised technology the so called AIS STDMA/ITDMA that operates ship-to-ship and ship-to-shore including limited communication capabilities. AIS does not require a radar. The International Telecommunication Union (ITU) has defined the technical standard and ratified the global frequen- cies. (see International standardisation below). International This article about the shipborne AIS (Automatic Identification Electrotechnical Commision (IEC) has accomplished the test System) is published by the Swedish Maritime Administra- standard . (see International standardisation below). This tion.(SMA). pamphlet will stress the adv