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Do all ships transmit AIS data ?

April 26, 2017AIS Data ships transmit

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Do all ships transmit AIS data ?

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For vessels on international voyages AIS is mandatory from the registered tonnage (RT) of 300. For vessels on national voyages it is mandatory from 500 RT. For passenger ships the regulation is as follows: International voyages: • All passenger ships and all other ships with registered tonnage >300 RT since 2004 National voyages: • All passenger ships and all other ships with registered tonnage >500 until 1.