Domanda 19, VFR Communications - ATPL - Airline Transport Pilot license

A condition of being threatened by serious and or immediate danger and of requiring immediate assistance.
A condition requiring immediate assistance.
A condition concerning the safety of an aircraft or other vehicle or of some person on board or within sight, but which does not require immediate assistance.
A condition concerning the safety of an aircraft or other vehicle or of some person on board or within sight and requiring immediate assistance.