Localizer Course Sector Angle Calculator (ICAO)

Units:

SI Units Non-SI Units

ILS Reference Point Selection:

See notes at bottom.

Point "T" Point "B"

Course Sector Width at Reference Point:

Select standard value or enter custom value.

Standard Custom

Distance Between LOC and RWY THR:

Enter distance between localizer and landing runway threshold.


Results

Maximum limit of localizer course sector angle: 6°


▶ Course Sector Angle (°):


Notes:

Reference point selection:

• LOC course sector width based on ILS Point "B" for runway codes 1 and 2 (Aeroplane Reference Field Length < 1200 m).

• LOC course sector width based on ILS Point "T" for runway codes 3 and 4 (Aeroplane Reference Field Length ≥ 1200 m).

Definitions:

• ILS Point "B": A point on the ILS glide path measured along the extended runway centre line in the approach direction a distance of 1050 m (3500 ft) from the threshold.

• ILS Point "T" (ILS reference datum): A point at a specified height located above the intersection of the runway centre line and the threshold and through which the downward extended straight portion of the ILS glide path passes.

Ref: ICAO Annex 10

Ibosoft, v1.0