The requested vessel with name WORKSHOP and MMSI:525456789 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
WORKSHOP N/A 248335521 VALLETTA Nov 21, 2017 11:46 UTC

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