The requested vessel with name VALKA and MMSI:0 and IMO:7305045 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
VALKA 8805303 275453000 BUSAN Feb 23, 2018 05:31 UTC
VALKAMA N/A 257868280 Feb 14, 2018 15:44 UTC

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