The requested vessel with name COIMBRA and MMSI:0 and IMO:7100574 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
COIMBRA 7228091 263555000 AVEIRO Dec 06, 2017 17:46 UTC

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