*Question T1E01:
[97.7(a)] When may an amateur station transmit without a control operator?*  

*Correct Answer is  D: Never*  

### AI Response: (may contain errors)  

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The correct answer to the question is **D: Never**. 

### Explanation of the Correct Answer:
- **Amateur stations must always have a control operator present** when transmitting. This is a fundamental rule in amateur radio to ensure that transmissions are properly monitored and comply with regulations. The control operator is responsible for the operation of the station and must be able to take control of the station at any time.

### Explanation of Incorrect Choices:
- **A: When using automatic control, such as in the case of a repeater**  
  - This choice is misleading. While repeaters can operate automatically, they still require a control operator to be responsible for the operation. The control operator must ensure that the repeater is functioning correctly and that it complies with all regulations.

- **B: When the station licensee is away and another licensed amateur is using the station**  
  - This is incorrect because even if another licensed amateur is using the station, there must still be a designated control operator present. The licensee cannot simply leave the station unattended.

- **C: When the transmitting station is an auxiliary station**  
  - This choice is also incorrect. Auxiliary stations, like all amateur stations, must have a control operator present during transmission. The classification of the station does not exempt it from this requirement.

### Summary:
- An amateur station must always have a control operator present during transmission to ensure compliance with regulations and proper operation. This is a key rule in amateur radio licensing and operation. 

Remember, the presence of a control operator is crucial for responsible amateur radio operation!