We permanently check our database for duplicate vessel entries, ghost ships, and other multiple entries.

AIS users are required to operate their vessels with a valid MMSI. Unfortunately, some users neglect to do so. If you receive (in range of) AIS reports from vessels using the same MMSI, they will appear as one vessel (jumping from position to position or line-to-line). The best way to track your vessel is to use the unique IMO number, if possible. However, the AIS system uses the MMSI, not the IMO number, to identify a vessel.


If vessels from duplicate entries or similar are present on My Fleet, they will be displayed as "Unavailable".

Who can use this feature

👥 Supported on Starter, Professional, Business, and Enterprise plans.

New to FleetMon My Fleet? Check out all FleetMon My Fleet articles →

💡 Note:

You can still remove the tag given or add a special description by editing the vessel.

And you can also delete the vessel from your My Fleet.

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