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G3C10:What is near vertical incidence skywave (NVIS) propagation?

G3C10G3C

What is near vertical incidence skywave (NVIS) propagation?

Direct answer summary (2023-2027 NCVEC pool)

The official correct answer for G3C10 is Short distance MF or HF propagation at high elevation angles.

The key fact is Short distance MF or HF propagation at high elevation angles. 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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