*Question T1D07:
[97.113(d)] What types of amateur stations can automatically retransmit the signals of other amateur stations?*  

*Correct Answer is  D: Repeater, auxiliary, or space stations*  

### AI Response: (may contain errors)  

To understand which types of amateur stations can automatically retransmit the signals of other amateur stations, let's break down the correct answer and the other options.

### Correct Answer: Repeater, Auxiliary, or Space Stations

1. **Repeater Stations**: 
   - These are specifically designed to receive a signal and retransmit it on a different frequency. They are commonly used to extend the range of communication.

2. **Auxiliary Stations**: 
   - These stations can provide support functions for other amateur stations, including retransmission of signals. They are often used in conjunction with repeaters.

3. **Space Stations**: 
   - These refer to amateur radio stations located in space, such as satellites. They can also automatically retransmit signals from other amateur stations on Earth.

### Why the Other Choices are Incorrect:

- **Choice A: Auxiliary, Beacon, or Earth Stations**:
  - **Beacon Stations**: These are used to transmit identification signals or information about propagation conditions, but they do not retransmit other amateur stations' signals.
  - **Earth Stations**: This term is too broad and does not specifically refer to stations that retransmit signals.

- **Choice B: Earth, Repeater, or Space Stations**:
  - **Earth Stations**: Similar to choice A, this term is too vague. It does not specify that the station must be capable of retransmitting signals.

- **Choice D: Repeater, Auxiliary, or Space Stations**:
  - This choice is actually correct, but it is not the answer provided in the question. It includes the same correct types of stations as the correct answer.

### Summary

The correct answer is **Repeater, Auxiliary, or Space Stations** because these types of stations are explicitly designed to retransmit signals from other amateur stations. 

### Useful Rules of Thumb

- **Repeaters**: Always remember that they are the backbone of local communication, allowing for extended range.
- **Auxiliary Stations**: Think of them as support stations that can enhance communication capabilities.
- **Space Stations**: These are unique in that they operate in a different environment but still serve the purpose of retransmission.

Understanding these distinctions will help you answer similar questions on the exam effectively.