The requested vessel with name NGOC SON and MMSI:574566666 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
NGOC SON 9353474 574351000 MALE_MALDIVES Aug 11, 2016 23:27 UTC

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