ეუფ ნისლი რაშუაში აეროპორტის შენობასთან სულ ძღნერისგან რომ იყოს ნაშენები თუ აეროპორტს არ აქვს ILS ( Instrumental Landing System ) ვერ დაჯდება ცუდ ამინდში ვიზუალურად. არსებობს ILS-ის სამი კატეგორია I , II და III CAT ILS. თუ იგივე ბურუსია რაც ეხლა ჩემ აივანზე მაშინ ავიაციიაში ამას ნულოვან ხედვას ეძახიან შესაბამისად აეროპორტს უნდა გაა|ჩნდეს CAT III ILS-ის სისტემა რომ 100% უსაფრთხოთ დაჯდეს ბორტი. და ზემოთჩამოთვლილს აეროპორტის ტერმინალთან არანაირი შეხება არ აქვს
http://en.wikipedia.org/wiki/Instrument_landing_systemILS categories
There are three categories of ILS which support similarly named categories of operation. Information below is based on ICAO - certain states may have filed differences. Check with your state's documentation.
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 800 meters (2,625 ft) or a runway visual range not less than 550 meters (1,804 ft).
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 350 meters (1,148 ft).
Category III is further subdivided
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 200 meters (656 ft).
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 200 meters (656 ft) but not less than 50 meters (164 ft).
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.
In each case a suitably equipped aircraft and appropriately qualified crew are required. For example, Cat IIIc requires a fail-operational system, along with a Landing Pilot (LP) who holds a Cat IIIc endorsement in their logbook, Cat I does not. A Head-Up Display which allows the pilot to perform aircraft maneuvers rather than an automatic system is considered as fail-operational. Cat I relies only on altimeter indications for decision height, whereas Cat II and Cat III approaches use radar altimeter to determine decision height.[2]
An ILS is required to shut down upon internal detection of a fault condition as mentioned in the monitoring section. With the increasing categories, ILS equipment is required to shut down faster since higher categories require shorter response times. For example, a Cat I localizer must shutdown within 10 seconds of detecting a fault, but a Cat III localizer must shut down in less than 2 seconds.[1
This post has been edited by Irakli.B on 7 Dec 2008, 23:19