What is cat 1, cat 2, and cat 3?

ILS, or Instrument Landing System, is a critical navigation aid for aircraft approaching and landing on runways. It consists of several categories, each with different requirements for visibility and decision height.

CAT III, on the other hand, offers even lower minimums, with some systems allowing for almost zero visibility landings. This is a crucial feature for airports located in areas prone to heavy fog or low visibility conditions.

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CAT I is the most basic form of ILS, requiring a minimum decision height of 200 feet and a runway visual range of 550 meters or more. This category is suitable for moderate to good weather conditions.

As the weather conditions deteriorate, aircraft require lower minimums for visibility and decision height to ensure SAFE landing. This is where CAT II and CAT III come into play.