The requested vessel with name MAMIN SIBIRYAK and MMSI:0 and IMO:5218729 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MAMIN-SIBIRYAK N/A 273314070 Sep 14, 2013 11:36 UTC

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