The requested vessel with name SEA DUKE and MMSI:0 and IMO:7808803 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
SEA DUKE 9406817 667001492 Dec 18, 2017 15:20 UTC

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