To do so, the GS airborne equipment provides a crossing height of about 50 ft at the runway threshold, with a standard angle of 3 degrees. The beams move moderately above and below the standard vertical profile that has been established for a safe approach and landing. Similarly, the GS airborne equipment uses two narrow beams that intersect, creating the “on GS” signal. This helps the ILS approach system to provide information regarding the altitude for the pilot to land the aircraft safely. While the localizer offers lateral guidance, the ILS glide slope is vertical. The pilot receives information regarding how far the aircraft is from the runway centerline via airborne equipment usually located at the opposite end of the runway threshold. The intersection is known as the “on LOC” signal or indicator. This is done by transmitting two narrow beams, one that goes moderately to the right and the other to the left of the centerline of the runway, and that intersect in that centerline. The localizer provides the lateral guidance for the pilot to align the aircraft with the runway properly. ![]() This is the primary component of the ILS approach. However, we want you to learn about all of them, so we describe them here below. Image source: The main componentsĪs it was mentioned above, there are two that are the most important components for the ILS approach and landing. Keep reading as we show you the details of the ILS components. These components are usually categorized in navigation, range, and visual, and the most important ones are the localizer and the glide-slope. ![]() The Instrument Landing System (ILS) is a precision aviation instrument based on radio beams that provide the pilot with both lateral and vertical guidance during the approach and landing stages of the flight.Īn instrument landing system has various essential components for proper operation, and each of them has a specific role. ![]() Instrument Landing System (ILS)Īn Instrument Landing System is defined as a group of navigation or precision approach assistance to safely guide the aircraft towards the runway. ILS stands for Instrument Landing System, so let’s see what ILS systems are. Sometimes, this must be done with visual limitations that prevent the pilot from using any external visual references.įortunately, ILS systems exist to help pilots achieve a safe approach and descend towards the landing area in any situation. Doing this properly is critical for the safety of the pilots, their crew, and passengers. One of the most complex stages of any flight is approaching the runway and landing at the end of it.
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