The requested vessel with name AMBITIOUS and MMSI:0 and IMO:5216460 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
AMBITIOUS 9257503 538007609 INCHEON Oct 06, 2017 15:04 UTC
AMBITIOUS N/A 250000399 HOWTH Oct 06, 2017 12:36 UTC
AMBITIOUS ALICE N/A 235015555 Oct 15, 2017 10:20 UTC
AMBITIOUS B420 N/A 235007359 FISHING GROUNDS Oct 10, 2017 16:58 UTC

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