The requested vessel with name WHITBY and MMSI:0 and IMO:5391727 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
WHITBY CREST N/A 235096797 Mar 07, 2017 09:20 UTC

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