*Question T1F02:
[97.119 (a)] How often must you identify with your FCC-assigned call sign when using tactical call signs such as “Race Headquarters”?*  

*Correct Answer is  C: At the end of each communication and every ten minutes during a communication*  

### AI Response: (may contain errors)  

When using tactical call signs, it's important to follow FCC regulations regarding identification. 

### Correct Answer: C - At the end of each communication and every ten minutes during a communication

1. **Why the correct answer is correct:**
   - The FCC requires that operators identify themselves with their assigned call sign at the end of each communication and every ten minutes during a communication when using tactical call signs. This ensures that the identity of the operator is clear and traceable, maintaining accountability and compliance with regulations.

2. **Why the other choices are incorrect:**
   - **A: Never, the tactical call is sufficient**  
     - This is incorrect because it does not comply with FCC rules. Operators must identify themselves, even when using tactical call signs.
   - **B: Once during every hour**  
     - This is incorrect as it does not meet the requirement for more frequent identification. The rules specify identification at the end of each communication and every ten minutes during a communication.
   - **D: At the end of every transmission**  
     - While this may seem reasonable, it is not sufficient. The requirement is to identify every ten minutes during a communication, not just at the end of each transmission.

### Rules of Thumb:
- Always identify with your FCC-assigned call sign when using tactical call signs.
- Remember the two key points for identification:
  - At the end of each communication.
  - Every ten minutes during a communication.

This ensures compliance with FCC regulations and maintains clear communication protocols.