The requested vessel with name HARPA and MMSI:251846870 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
HARPA N/A 251844970 Feb 12, 2018 00:01 UTC
HARPA DORIS 9449211 617069000 PORTO GRANDE Oct 31, 2017 13:12 UTC
HARPA HU 4 1126 N/A 251561110 Feb 01, 2018 14:26 UTC

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