Which of the following frequency ranges is associated with the decameter band?

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Prepare for the NTC Restricted Radiotelephone Operator’s Certificate (RROC) - Aircraft Test. Study with flashcards and multiple-choice questions, each with hints and explanations. Ensure success on your examination!

Multiple Choice

Which of the following frequency ranges is associated with the decameter band?

Explanation:
The decameter band refers to radio waves with wavelengths in the decameter range, about 10 to 100 meters. Frequency and wavelength relate by f ≈ 300 / λ (with f in MHz and λ in meters). For λ = 100 m, f ≈ 3 MHz; for λ = 10 m, f ≈ 30 MHz. So the decameter band spans roughly 3 to 30 MHz. The other options don’t fit: 3 Hz to 30 Hz is ELF, far too low; 118 MHz is in the VHF range; 400 MHz is UHF. Hence the correct range is 3 to 30 MHz.

The decameter band refers to radio waves with wavelengths in the decameter range, about 10 to 100 meters. Frequency and wavelength relate by f ≈ 300 / λ (with f in MHz and λ in meters). For λ = 100 m, f ≈ 3 MHz; for λ = 10 m, f ≈ 30 MHz. So the decameter band spans roughly 3 to 30 MHz. The other options don’t fit: 3 Hz to 30 Hz is ELF, far too low; 118 MHz is in the VHF range; 400 MHz is UHF. Hence the correct range is 3 to 30 MHz.

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