The requested vessel with name MATHILDA SOUND and MMSI:249000199 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MATHILDA SOUND N/A 549000199 Oct 11, 2017 09:43 UTC

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