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392 bytes added ,  30 July 2020
→‎Ship tracking: + IMO requires ships over 300 w:gross tonnage to install an AIS w:transponder on board. The transponder transmits vessel position, SOG and COG (speed and course over ground), ship name, ship size and next port of call
(+ changed heading to + == Ship tracking == + added AIS Data Exchange at AISHub.net - AIS data sharing and vessel tracking by AISHub)
(→‎Ship tracking: + IMO requires ships over 300 w:gross tonnage to install an AIS w:transponder on board. The transponder transmits vessel position, SOG and COG (speed and course over ground), ship name, ship size and next port of call)
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== Ship tracking ==
== Ship tracking ==
Various ship-tracking services exist that get their data feed from  '''[[w:Automatic identification system]]s'''. AIS tracking become mandatory on all ships since 2004. <ref>http://www.vesseltracking.net/article/free-ais-ship-tracking-web-sites</ref>
Various ship-tracking services exist that get their data feed from  '''[[w:Automatic identification system]]s'''. AIS tracking become mandatory on all ships since 2004 <ref>http://www.vesseltracking.net/article/free-ais-ship-tracking-web-sites</ref> as [[w:International Maritime Organization|IMO]] requires ships over 300 [[w:gross tonnage]] to install an AIS [[w:transponder]] on board. The transponder transmits vessel position, SOG and COG (speed and [[w:Course (navigation)|course]] [[w:Ground speed|over ground]]), ship name, ship size and next [[w:Port#Port_of_call|port of call]].<ref>http://www.marinetraffic.org/marine-traffic</ref>


AIS uses '''[[w:Maritime Mobile Service Identity]]''' codegroups for ship ID
AIS uses '''[[w:Maritime Mobile Service Identity]]''' codegroups for ship ID
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