92-06. General Principles of VHF Propagation and Allocation of Frequencies
All questions: 19
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1. The VHF aviation band channel spacing in upper airspace is:
2. The wavelength of a radio aid is 6,97 cm. The corresponding frequency and frequency band are:
3. HF Frequency bands used for aviation are between:
4. VHF communications sometimes experience extended ranges as a result of:
5. Attenuation of radio waves means:
