On what HF frequencies are automatically controlled beacons permitted?
On any frequency if power is less than 1 watt
On any frequency if transmissions are in Morse code
21.08 MHz to 21.09 MHz
28.20 MHz to 28.30 MHz✓Correct answer
Explanation
Automatic control of beacons is allowed only in specific named segments, and on HF there is exactly one: the 100 kHz at the bottom of the 10 meter phone-free portion. Low power or Morse code does not create automatic control authority anywhere else.