The requested vessel with name VIKING SURF and MMSI:708973974 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
VIKING SURF 9257606 710022550 BOIA 5 Jun 30, 2017 06:36 UTC

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