*Question T1D02:
[97.113(b), 97.111(b)] Under which of the following circumstances are one-way transmissions by an amateur station prohibited?*  

*Correct Answer is  B: Broadcasting*  

### AI Response: (may contain errors)  

In the context of amateur radio, one-way transmissions are generally restricted to ensure that amateur stations operate within the guidelines set by the FCC. Let's break down the question and the answer choices.

### Correct Answer: B - Broadcasting

- **Why this is correct**: Broadcasting is defined as transmitting information intended for the general public without the expectation of a response. Amateur radio is not intended for broadcasting; it is meant for two-way communication. Therefore, one-way transmissions that resemble broadcasting are prohibited.

### Why the Other Choices are Incorrect:

- **A: In all circumstances**: This is incorrect because there are specific situations where one-way transmissions are allowed, such as in emergency communications or when sending practice transmissions in Morse code.

- **C: International Morse Code Practice**: This is incorrect because one-way transmissions are permitted for the purpose of practicing Morse code. Amateur operators can send Morse code practice transmissions without requiring a response.

- **D: Telecommand or transmissions of telemetry**: This is incorrect as well. One-way transmissions are allowed for telecommand (sending control signals to a device) and telemetry (sending data from a remote source). These types of transmissions are part of the amateur radio service and are specifically permitted under certain conditions.

### Summary

- **Prohibited One-Way Transmission**: Broadcasting
- **Allowed One-Way Transmissions**: Morse code practice, telecommand, and telemetry

Understanding these distinctions is crucial for the Extra Class exam and for operating within the legal framework of amateur radio.