How often must you identify with your FCC-assigned call sign when using tactical call signs such as “Race Headquarters”?
Never, the tactical call is sufficient
Once every hour
At least every 10 minutes during and at the end of a communication✓الإجابة الصحيحة
At the end of every transmission
الشرح
Tactical call signs are an operating convenience and carry no legal identification value, so the ordinary identification interval still governs. That means your FCC-assigned call sign at least every 10 minutes and at the end of the exchange.