In air traffic control, the term "OVER" signifies what?

In the context of air traffic control, the term "OVER" is used to indicate that a transmission is complete and the controller is awaiting a response from the pilot. This is a crucial aspect of radio communication in aviation, as it helps clarify when one party has finished their message and is expecting a reply.

Using "OVER" communicates effectively between the air traffic controller and the pilot, ensuring a clear understanding that the speaker’s transmission is finished while prompting for a response. This helps maintain organized communication, which is vital for safety and efficiency in air traffic management, as it prevents confusion over whether the transmission has ended or not.

Other options do not accurately capture the definition of "OVER." For instance, a term indicating a turn for landing would not require a waiting response but rather a directive, while change in altitude instructions or end of communication would use different terminology more suited to their specific functions. Thus, "OVER" specifically signals the completion of a transmission while inviting a response.