Domanda 47, VFR Communications - ATPL - Airline Transport Pilot license

A transmission of information relating to air navigation that is not addressed to a specific station or stations.
A transmission from one station to another station in circumstances where two-way communication cannot be established but it is believed that the called station is able to receive the transmission.
A transmission where no reply is required from the receiving station.
A transmission of messages relating to en-route weather information which may affect the safety of aircraft operations that is not addressed to a specific station or stations.