Practice question

In which frequency band do Instrument Landing System (ILS) localizers operate, and how are their frequencies assigned?

  1. 108.10 MHz to 111.95 MHz, utilizing only odd-tenths decimal places.
  2. 108.00 MHz to 117.95 MHz, utilizing all decimal channels.
  3. 328.60 MHz to 335.40 MHz, utilizing odd-tenths decimal places.
  4. 118.00 MHz to 136.975 MHz, utilizing 8.33 kHz spacing.

Answer: A — 108.10 MHz to 111.95 MHz, utilizing only odd-tenths decimal places.

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