*Question E1D06:
[97.215(c)] What is the maximum permitted transmitter output power when operating a model craft by telecommand?*  

*Correct Answer is  A: 1 watt*  

### AI Response: (may contain errors)  

The correct answer to the question about the maximum permitted transmitter output power when operating a model craft by telecommand is **1 watt**. 

### Explanation of the Correct Answer:
- According to FCC regulations, specifically 47 CFR 97.215(c), the maximum output power for telecommand of model craft is limited to **1 watt**. This regulation is in place to minimize interference with other radio services and to ensure safe operation of model craft.

### Why the Other Choices are Incorrect:
- **2 watts**: This exceeds the legal limit set by the FCC for model craft telecommand operations.
- **5 watts**: This is also above the maximum permitted output power and could lead to interference with other users of the radio spectrum.
- **100 watts**: This is significantly higher than the allowed limit and poses a greater risk of interference and safety issues.

### Useful Rules of Thumb:
- Always refer to the specific regulations for the type of operation you are conducting. In this case, the limit is clearly defined in the FCC rules.
- For model craft operations, keeping the power output at or below 1 watt ensures compliance and reduces the risk of interference with other radio services.

By understanding these limits, you can ensure that your operations are both legal and safe.