INSTRUMENT RUNWAY

      Instrument runway. One of the following types of runways intended for the operation of aircraft using
instrument approach procedures:
     1.Non-precision approach runway. An instrument runway served by visual aids and a non-visual aid providing at least directional guidance adequate for a straight-in approach.
     2.Precision approach runway, category I. 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.
      3.Precision approach runway, category II. 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 lower than 350 m.
      4. Precision approach runway, category III. 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), 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 visual range limitations.