How to play
- Choose a subject and whether you want four answers to pick from or to type the answer.
- A round has 10 sentences. After each one you see the right term and a short reminder.
- When you type, a one-letter spelling slip is accepted, and numbers can be typed with or without units.
- The Hint button gives the first letter and the length, but the answer then scores no point.
The sentences are simplified teaching versions of the ICAO Annexes and common rules. For exact wording, check the Annex, the CAR or the AIP.