If you see this message : "Unknown country" while viewing an aircraft's page it means the system is not able to detect what country is related to the aircraft's registration. The problem may come from one of those things:

- The aircraft is registered as a FSS and therefore there is only an "simulator number".
- The registration's country mark is unknown.
- You forgot the registration's country mark in the aircraft registration. (ex: C-GABC, C- is the registration's country mark).