How often must you identify with your FCC-assigned call sign when using tactical call signs?

When using tactical call signs, it is important to maintain proper identification in accordance with FCC regulations. The requirement is to identify with your FCC-assigned call sign at the end of each transmission and every ten minutes during a communication. This practice ensures that communication remains clear and accountable, allowing others to know who is transmitting, especially in tactical situations where many operators may be communicating simultaneously. Regular identification helps maintain proper operating protocols and enhances the overall safety and effectiveness of communications, as it allows participants to keep track of who is on the air.

The other options fall short of these requirements; for example, stating that the tactical call is sufficient overlooks the need for formal identification. Additionally, only identifying once per hour or at the end of every transmission does not adequately fulfill the obligation outlined by the FCC, which is aimed at providing clear and responsible communication guidelines.