*Question E1D12:
[97.207(e), 97.203(g)] Which of the following amateur stations may transmit one-way communications?*  

*Correct Answer is  A: A space station, beacon station, or telecommand station*  

### AI Response: (may contain errors)  

In the context of amateur radio, one-way communications refer to transmissions that do not expect a response from another station. The FCC rules specify which types of amateur stations are allowed to transmit one-way communications.

### Explanation:

1. **Correct Answer: A space station, beacon station, or telecommand station**

   - **Space Station**: These are stations located more than 50 km above the Earth's surface. They often transmit data or signals that do not require a response, such as telemetry or scientific data.
   - **Beacon Station**: These stations transmit signals for the purpose of propagation research or to identify the station's location. They are inherently one-way as they broadcast information without expecting a reply.
   - **Telecommand Station**: These stations send commands to control a device, such as a satellite. The communication is one-way as it involves sending instructions without needing a direct response.

2. **Why the Other Choices are Incorrect:**

   - **B: A local repeater or linked repeater station**: Repeaters are designed to receive and retransmit signals, facilitating two-way communication. They are not intended for one-way transmissions.
   - **C: A message forwarding station or automatically controlled digital station**: These stations are involved in relaying messages or digital data, which typically involves two-way communication or acknowledgment of receipt.

3. **Useful Rules of Thumb:**

   - **One-Way Communication**: Generally allowed for specific purposes like propagation studies, telemetry, or control signals.
   - **Two-Way Communication**: Most amateur radio activities involve two-way communication, where stations expect a response.

Understanding these distinctions helps ensure compliance with FCC regulations and proper use of amateur radio privileges.