RADAR

The RADAR range in nautical miles to an object can be found by measuring the elapsed time during a RADAR pulse and dividing this quantity by:

Answer

12.346 µs.

Radar range in nautical miles equals the round-trip echo time divided by about 12.36 microseconds per nautical mile.

Source: FCC Element 3 question pool, 3O

Not the answer

  • 0.87 seconds.
  • 1.15 µs.
  • 1.073 µs.

Practice this

The FCC Element 3 (General Radiotelephone) exam is 100 questions and takes 75 correct — 75% — to pass. Element 1, the other half of the licence, is 24 questions and takes 18 correct. The app’s page carries a free ten-question test drawn from the same bank, marked as you go.

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