The requested vessel with name CHUKOTKA and MMSI:0 and IMO:8930031 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
CHUKOTKA+ 7927960 273389070 VLADIVOSTOK Oct 28, 2017 01:45 UTC

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