The requested vessel with name ARITA and MMSI:0 and IMO:5373141 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
ARITA 9503574 422064400 SHIPYARD Aug 22, 2017 09:53 UTC
ARITA MARU N/A 431000234 >JP KSM Aug 21, 2017 14:16 UTC
ARITAMARU N/A 431002928 JP MIZ Jul 13, 2017 23:01 UTC

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