Where is the localiser typically located?

The localiser is an essential component of an Instrument Landing System (ILS) and is typically located at the end of the runway, aligned with the centerline. Its primary function is to provide accurate lateral guidance to approaching aircraft, ensuring they are on the correct path to land. By emitting a specific radio frequency signal, the localiser helps pilots align their planes with the runway during the final stages of approach.

This positioning allows the localiser to effectively guide pilots as they descend towards the runway, especially in low visibility conditions. The end position is crucial because it allows for a clearer reception of landing guidance right as the aircraft approaches the threshold.

Other options, while they may suggest potential locations for equipment, do not align with the specific operational purpose and standard placement of the localiser within aviation protocols.