The requested vessel with name SOUTHERN EXPLORER and MMSI:0 and IMO:7308970 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
SOUTHERN EXPLORER 9248459 354151000 PE SNX Oct 31, 2017 23:10 UTC

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