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ICAO characterizes DME transmissions as ___________

(a) High frequency

(b) Ultra high frequency

(c) Low frequency

(d) Medium frequency

The question was asked in a national level competition.

Question is taken from Aviation Communication Systems in portion Aviation Communication Systems of Aircraft Maintenance

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Right answer is (b) Ultra high frequency

The explanation: ICAO characterizes DME transmissions as UHF or ultra high frequency. This is because of the relatively high frequency of such transmissions in comparison to other transmissions. It may also be described by the term L-band.

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