Merhabalar, konu üzerinden 2 haftadan fazla zaman geçmiş ama yine de bilgilendirme olması için aşağıdaki bilgi işinize yarayabilir.
Aletli iniş sistemi aşağıdaki kategorilere ayrılıyor:
There are three categories of ILS which support similarly named categories of operation.
Category I - A precision instrument approach and landing with a decision height not lower than 200 feet (61 m) above touchdown zone elevation and with either a visibility not less than 2,625 feet (800 m) or a runway visual range not less than 2,400 feet (730 m), (with touchdown zone and center lightning, RVR 1,800ft). An aircraft equipped with an Enhanced Flight Vision System may, under certain circumstances, continue an approach to CAT II minimums. [14 CFR Part 91.175 amendment 281]
Category II - Category II operation: A precision instrument approach and landing with a decision height lower than 200 feet (61 m) above touchdown zone elevation but not lower than 100 feet (30 m), and a runway visual range not less than 1,200 feet (370 m).
Category III is further subdivided
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Category III A - A precision instrument approach and landing with:
+ a) a decision height lower than 100 feet (30 m) above touchdown zone elevation, or no decision height; and
+ b) a runway visual range not less than 700 feet (210 m).
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Category III B - A precision instrument approach and landing with:
+ a) a decision height lower than 50 feet (15 m) above touchdown zone elevation, or no decision height; and
+ b) a runway visual range less than 700 feet (210 m) but not less than 150 feet (46 m).
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Category III C - A precision instrument approach and landing with no decision height and no runway visual range limitations. A Category III C system is capable of using an aircraft's autopilot to land the aircraft and can also provide guidance along the runway surface.
Altuğ Yavaş
FlyTHY PID2470
İstanbul, 1976