The requested vessel with name SEVERNAYA ZEMLYA and MMSI:0 and IMO:5321368 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
SEVERNAYA ZEMLYA 9551923 273337230 ARKHANGELSK Feb 17, 2018 04:46 UTC

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