The requested vessel with name BERTHA and MMSI:0 and IMO:8137500 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
BERTHA N/A 338155876 Jan 09, 2018 18:00 UTC
BERTHA D 9399442 367111870 Feb 23, 2018 22:52 UTC

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