The requested vessel with name FITZROY 15 and MMSI:0 and IMO:1011812 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
FITZROY STAR N/A 503562300 Feb 21, 2018 10:18 UTC

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