Except when transmissions relate to switching operations, when a radio communication is complete and a response is expected , the transmitting employee must say :

• A. Over
• B. The required identification followed by "Out"
• C. The end of transmission
• D. Yes

Answer: (A)

The key idea is how radio chatter is managed on a shared channel. When you’ve finished your message and you’re waiting for a reply, you end with Over. This signals to the other person that you’re done speaking and that a response is expected, allowing them to know when they should talk.

Using Over keeps the channel orderly and helps prevent people from talking over each other. In contrast, saying Out would imply you’re finished and do not expect a reply, which could lead to important information being missed. Phrases like “the end of transmission” aren’t standard signals for prompting a reply, and simply saying Yes doesn’t initiate a response.

There is an exception for switching operations, but for normal communications, Over is the proper signal to indicate you’ve finished transmitting and await a response.