The requested vessel with name JON GUNNLAUGS and MMSI:251335110 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
JON GUNNLAUGSSON N/A 251848770 CH 16 FOR INFO Feb 19, 2018 18:38 UTC

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