What is Pseudo AIS and Virtual AIS

VTS centers may send information about vessels which are not carrying AIS and which are tracked only by VTS radar, via the AIS to vessels equipped with AIS. These are Pseudo AIS.


Any pseudo AIS target broadcast by VTS should be clearly identified and particular care should always be taken when using information which has been relayed by a third party.


Accuracy of these targets may not be as accurate, as actual directly-received targets and the information content may not be as complete.


A Virtual AIS aid to navigation does not physically exist but is a digital information object

promulgated by an authorized service provider that can be presented on navigational Systems serviceprovider that can be presented on navigational systems.