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When is an amateur station required to transmit its assigned call sign?

  1. At the end of each communication only

  2. At least every 10 minutes during and at the end of a communication

  3. Every 5 minutes during a communication

  4. At the start of the operation

The correct answer is: At least every 10 minutes during and at the end of a communication

An amateur station is required to transmit its assigned call sign at least every 10 minutes during a communication and at the end of that communication. This requirement is outlined in the FCC regulations to ensure proper identification of the station, which promotes accountability and helps prevent interference among operators. Transmitting the call sign at these intervals allows other operators to be aware of who is communicating, fostering good operation practices within the amateur radio community. In casual or emergency communications, inserting the call sign at these intervals serves to maintain a clear record of who is communicating, which can be especially important for safety and clarity in busy or critical situations. Furthermore, it aligns with the broader principles of identifying oneself in a licensed capacity that is characteristic of amateur radio operations. Regularly transmitting the call sign helps maintain adherence to licensing regulations and promotes responsible use of the spectrum.