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G3B11:What happens to HF propagation when the LUF exceeds the MUF?

G3B11G3B

What happens to HF propagation when the LUF exceeds the MUF?

Direct answer summary (2023-2027 NCVEC pool)

The official correct answer for G3B11 is Propagation via ordinary skywave communications is not possible over that path.

The key fact is Propagation via ordinary skywave communications is not possible over that path. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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More questions in G3B

G3B01What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?G3B02What factors affect the MUF?G3B03Which frequency will have the least attenuation for long-distance skip propagation?G3B04Which of the following is a way to determine current propagation on a desired band from your station?G3B05How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?G3B06What usually happens to radio waves with frequencies below the LUF?