chapter  12
7 Operational aspects of ILS
Pages 1

ILS remains installed throughout the world and is

the basis of automatic approach and landing for

many aircraft types. Limitations of ILS are the

single approach paths from the glide slope and

localizer; this can be a problem for airfields

located in mountainous regions. Furthermore, any

vehicle or aircraft approaching or crossing the

runway can cause a disturbance to the localizer

beam, which could be interpreted by the airborne

equipment as an unreliable signal. This often

causes an AFCS channel to disconnect with the

possibility of a missed approach. The local terrain

can also have an effect on ILS performance, e.g.