How often must an amateur station transmit its call sign during communications?

An amateur station is required to transmit its call sign at the beginning and the end of each exchange to ensure proper identification and compliance with regulations. This practice is crucial for maintaining the integrity of communication in the amateur radio community, as it allows operators to identify themselves and their station clearly to others on the frequency.

Beginning the exchange with your call sign establishes who is communicating, enabling other operators to respond and participate effectively. Concluding with your call sign serves to confirm that the communication has completed and clarifies the station that was transmitting. Transmitting your call sign enhances accountability and encourages responsible operating practices among amateur radio operators.

Other options suggest different frequencies for identification, but only identifying at the beginning and end is aligned with the regulations governing amateur radio operations, promoting clarity and compliance within the communications.