Definition: Instrument runway

Category: Transport

One of the following types of runway intended for the operation of aircraft using instrument procedures:
i) Non-precision approach runway ICAO
An instrument runway served by visual aids and a non-visual aid providing at least directional guidance adequate for a straight-on approach
ii) Precision approach runway, category I ICAO
An instrument runway served by ILS and/or MLS and visual aids intended for operations with a decision height not lower than 60 m (200 ft) and either a visibility not less than 800 m or a runway visual range not less than 550 m.
iii) Precision approach runway, category II ICAO
An instrument runway served by ILS and/or MLS and visual aids intended for operations with a decision height lower than 60 m (200 ft) but not lower than 30 m (100 ft) and a runway visual range not less than 350 m.
iv) Precision approach runway, category III ICAO
An instrument runway served by ILS and/or MLS to and along the surface of the runway and:
A - intended for operations with a decision height lower than 30 m (100 ft), or no decision height and a runway visual range not less than 200 m.
B - intended for operations with a decision height lower than 15 m (50 ft), or no decision height and a runway visual range less than 200 m but not less than 50 m.
C - intended for operations with no decision height and no runway visual range limitations.
Visual aids need not necessarily be matched to the scale of non-visual aids provided. The criterion for the selection of visual aids is the conditions in which operations are intended to be conducted.