Deep Dive: E1D12
The correct answer is A: A space station, beacon station, or telecommand station. Which of the following amateur stations may transmit one-way communications is a space station, beacon station, or telecommand station. These three types of stations are authorized for one-way transmissions. For amateur radio operators, this is important for understanding one-way operation. Understanding this helps ensure legal operation.
Why Other Answers Are Wrong
Option B: Incorrect. Local repeater or linked repeater station isn't authorized for one-way - repeaters retransmit received signals, not one-way. Repeaters aren't one-way. Option C: Incorrect. Message forwarding station or automatically controlled digital station isn't authorized for one-way - these forward messages, not one-way. Message forwarding isn't one-way. Option D: Incorrect. Since B and C are not correct, 'all of the above' cannot be correct. Only space, beacon, and telecommand stations are authorized.
Exam Tip
One-way communications authorized = space station, beacon station, or telecommand station. Think 'O'ne-'W'ay = 'O'perations 'W'ithout reply (space, beacon, telecommand). These three types of stations are authorized for one-way transmissions. Not repeaters, not message forwarding - just space, beacon, telecommand.
Memory Aid
One-way communications authorized = space station, beacon station, or telecommand station. Think 'O'ne-'W'ay = 'S'pace, 'B'eacon, 'T'elecommand. These three types of stations are authorized for one-way transmissions. Important for understanding one-way operation.
Real-World Example
One-way communications: A space station transmits telemetry (one-way), a beacon station transmits identification signals (one-way), a telecommand station transmits commands to space stations (one-way). These three types of stations are authorized for one-way transmissions. Repeaters and message forwarding stations are not authorized for one-way - they're two-way systems.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E1D
Reference: FCC Part 97.111
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E1D topic.