The requested vessel with name BEREZOV and MMSI:0 and IMO:8947943 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
BEREZOVETS 8885200 273420230 SEVASTOPOL Dec 13, 2017 06:11 UTC
BEREZOVNEFT 7109336 273831000 VANINO Oct 28, 2017 08:24 UTC

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