In radio communication, what does the word "ROGER" confirm?

In radio communication, the word "ROGER" is used to confirm that a message has been received and acknowledged by the receiver. When someone says "ROGER," it signifies that they understood the communication clearly. This term is part of standard aviation and military communication protocols, helping to ensure clarity and reduce miscommunication.

The other options reference different aspects of communication: stating that a message is complete would typically be communicated with phrases like “OVER” or “OUT,” indicating that no further response is necessary, while "under review" or "unclear" would signal either that the message requires further consideration or that additional clarity is needed, neither of which aligns with the meaning of "ROGER." Thus, acknowledging the message is the essence of what "ROGER" conveys in radio interactions.