The requested vessel with name MARINER A and MMSI:0 and IMO:7005736 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MARINER A 9288954 215817000 NOVOROSSISYK,RUSSIA Feb 23, 2018 14:08 UTC

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