The requested vessel with name RIONI and MMSI:0 and IMO:5352630 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
RIONI N/A 273555555 ROSTOV Oct 23, 2017 08:50 UTC
RIONI N/A 272668000 Sep 07, 2017 07:41 UTC
RIONI0759 N/A 273382960 Sep 18, 2017 23:05 UTC

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