Height (TCH) DOES NOT represent the height of the actual glide path on The published glide slope threshold crossing Make every effort to remain on the indicatedĪvoid flying below the glide path to assure obstacle/terrain clearance is maintained. Glidepath interception. False courses and reverse sensing will occur at angles considerably greater than the published path. Pilots must be alert when approaching the The glide path projection angle is normallyĪdjusted to 3 degrees above horizontal so that it intersects the MM at about 200 feet and the OM at about 1,400 feet above the runway elevation. The glide slope is normally usable to the distance of 10 NM. However, at some locations, the glide slope has been certified for an extended service volume which exceeds 10 NM. The glide slope transmitter is located betweenħ50 feet and 1,250 feet from the approach end of the runway (down the runway) and offset 250 to 650 feet from the runway centerline. It transmits a glide path beam 1.4 degrees wide (vertically). The signal provides descent information for navigation down to the lowest authorized decision height (DH) specified in the approved ILS approach procedure. The glidepath may not be suitable for navigation below the lowest authorized DH and any reference to glidepath indications below that height must be supplemented by visual reference to the runway environment. Glidepaths with no published DH are usable to runway threshold. On one of the 40 ILS channels within the frequency range 329.15 MHz, to 335.00 MHz radiates its signals in the direction of the localizer front course. The term “glide path” means that portion of the glide slope that intersects the localizer.įalse glide slope signals may exist in the area of the localizer back course approach which can cause the glide slope flag alarm to disappear and present unreliable glide slope information. Disregard all glide slope signal indications when making a localizer back course approach unless a glide slope is specified on the approach and landing chart.

The UHF glide slope transmitter, operating

Maneuvering will be required compared to an ILS approach.

Localizer back course