Theorie Basiskurs

In a radio communication the principle of radio discipline always applies.  These are regulations about the behaviour when transmitting radio messages.  The radio discipline includes: The prohibition of jokes, insults or intentional disturbances; such as playing music, unauthorized interruption, etc.  These prohibitions exist mainly in the professional field of application.  The reason for this is the maintenance of a minimum standard of orderly communication, their effectiveness and unambiguity (misunderstandings regarding the broadcaster, etc.) as well as the maintenance of security (priority levels such as Pan-pan and Mayday).  In the latter case, occupied channels (frequencies) may, under certain circumstances, mean that urgent messages can not be received because routine radio broadcasts are taking place.  The request "radio discipline!”

Keep the radio quiet by:  

• Only say what needs to be said.  
• Do not speak when someone else is speaking. Exception: emergency messages. These, almost always, have priority and should be treated as such.