Regularity messages are messages...
Domanda 23, Communication - PPL(A) English - Private Pilot License (Aircraft)
| Concerning the safety of an aircraft, a watercraft or some other vehicle or person in sight. |
| Concerning aircraft and their passengers which face a grave and imminent threat and require immediate assistance. |
| Sent by an aircraft operating agency or an aircraft of immediate concern to an aircraft in flight |
| Concerning the operation or maintenance of facilities essential for the safety or regularity of aircraft operation |
