The requested vessel with name YOKOHAMA and MMSI:0 and IMO:7519426 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
YOKOHAMA 8223062 671790000 KHERSON Sep 10, 2017 19:22 UTC
YOKOHAMA PIONEER 9747273 374842000 >CN ZUH Feb 21, 2018 13:24 UTC

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