An aircraft landing instrument that provides the pilot with a set of vertical and horizontal cross pointers that indicate deviation from a radio-transmitted course to the threshold of the runway. A dual-frequency transmitter sends out one frequency to the right of the runway centerline and a second frequency to the left of the runway centerline. The reception of these signals in the aircraft biases the vertical needle to the left or right depending on the position of the aircraft relative to the transmitted 5° localizer path. Simultaneously, another dual-frequency transmitter causes a horizontal needle to indicate high or low as the aircraft descent path is compared to the transmitted 3° glide path. This indicator, when properly used with the other navigation instruments, allows approaches to be made to within 200 ft (60 m) of altitude and 0.5 mi (0.8 km) of the runway threshold, at which time the approach transfers to a visual type, or is aborted if no visual contact is made.