The requested vessel with name GOLDEN BEAR and MMSI:0 and IMO:5233731 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
GOLDEN BEAR N/A 366976780 <>US SFO 4(?04]2G?F Feb 18, 2018 02:49 UTC

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