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 Dec 12, 2017 07:32 UTC
BERTHA D 9399442 367111870 Dec 12, 2017 07:32 UTC

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