The requested vessel with name SILVIA ONORATO and MMSI:0 and IMO:5317408 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
SILVIA ONORATO 8714906 247429000 SARROCH Feb 25, 2018 11:52 UTC

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