Domanda 23, VFR Communications - ATPL - Airline Transport Pilot license

A station in the aeronautical mobile service located on land or, in certain instances, on board of a ship or on a platform at sea
An airborne station forming part of the aeronautical fixed telecommunication network (AFTN)
A station in the aeronautical telecommunication service located on land or on board of an aircraft to exchange radiotelephony communications
Any station established to exchange radiotelephony communications