*Question G1B01:
[97.15(a)] What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?*  

*Correct Answer is  C: 200 feet*  

### AI Response: (may contain errors)  

In the context of amateur radio, the Federal Communications Commission (FCC) and the Federal Aviation Administration (FAA) have specific regulations regarding the height of antenna structures to ensure they do not pose a hazard to air navigation.

1. **Correct Answer Explanation:**
   - The correct answer is **C: 200 feet**. According to FCC regulations, an antenna structure that is not near a public use airport can be erected up to 200 feet above ground level without requiring notification to the FAA or registration with the FCC. This height is considered safe for air navigation in most areas.

2. **Incorrect Answers Explanation:**
   - **A: 50 feet** and **B: 100 feet**: These heights are below the threshold that requires notification or registration. While they are safe, they are not the maximum height allowed without notification.
   - **D: 250 feet**: This height exceeds the 200-foot limit and would require notification to the FAA and registration with the FCC to ensure it does not interfere with air navigation.

3. **Useful Rule of Thumb:**
   - If an antenna structure is **200 feet or taller**, or if it is near an airport, it typically requires notification to the FAA and registration with the FCC. This rule helps prevent potential hazards to aircraft.

Understanding these regulations is crucial for ensuring compliance and safety in amateur radio operations.