Multiple choice

CAT III-C Instrument Landing System is defined by what decision height?

  1. 50 Feet

  2. 30 Feet

  3. 20 Feet

  4. No limitations
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CAT III-C represents the highest level of ILS capability, with no decision height limitation and no runway visual range requirement. It allows for 'zero-zero' landings in essentially zero visibility conditions. CAT III-A has DH < 100 feet and RVR >= 700 feet, CAT III-B has DH < 50 feet and RVR >= 150 feet, while CAT III-C has no DH or RVR minimums.

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