*Question G1E11:
[97.221, 97.305] On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?*  

*Correct Answer is  D: Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands*  

### AI Response: (may contain errors)  

To understand why the correct answer is "Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands," let's break down the rules and options:

1. **Correct Answer Explanation (D):**  
   - Automatically controlled digital stations are allowed to operate on the 6-meter band and shorter wavelength bands without specific sub-band restrictions.  
   - For HF bands, there are specific segments where automatically controlled digital stations can operate. These segments are defined by the FCC and are limited to certain frequencies to prevent interference with other modes of communication.

2. **Why Other Choices Are Incorrect:**

   - **Choice A:** "On any band segment where digital operation is permitted" is incorrect because not all digital segments allow automatic control. There are specific sub-bands designated for automatically controlled digital stations.
   
   - **Choice B:** "Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands" is incorrect because it implies broader access than is allowed. Automatic control is not permitted in all non-phone segments, especially on the 10-meter band.
   
   - **Choice C:** "Only in the non-phone Extra Class segments of the bands" is incorrect because it restricts operation to Extra Class segments, which is not the case. Automatically controlled digital stations have specific sub-bands that are not limited to Extra Class licensees.

3. **Useful Rules of Thumb:**
   - Automatically controlled digital stations have more freedom on VHF and UHF bands (6 meters and above).
   - On HF bands, check the specific sub-band allocations for automatically controlled digital operations, as these are more restricted.

Understanding these rules helps ensure compliance with FCC regulations and prevents interference with other amateur radio operations.