The requested vessel with name HOVER and MMSI:0 and IMO:5143821 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
HOVERCRAFT 1 N/A 512004583 Jul 30, 2017 05:53 UTC
HOVERCRAFT NBRK N/A 265721660 Feb 28, 2017 20:33 UTC
HOVERCRAFT2 N/A 512004786 Oct 17, 2016 05:25 UTC
HOVERNO8 N/A 477995677 Jan 20, 2018 02:08 UTC

Also, you may try to find the vessel in our comprehensive Vessels Database or track this ship on the map.