The requested vessel with name VIOLENT and MMSI:0 and IMO:7513800 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
VIOLENTO N/A 244630665 EVRY Dec 05, 2017 07:01 UTC

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