The requested vessel with name PERTAMA and MMSI:0 and IMO:6521109 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
PERTAMA 9425409 508025000 MRAENT Apr 01, 2016 22:28 UTC
PERTAMA ABADI N/A 466045000 Oct 18, 2017 15:32 UTC

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