![]() ![]() Using the example above, if Pompano Beach had a back course approach, you could use it to land on Runway 33 with the same equipment. The localizer back course (LOC BC) is one that is flown in reverse. There are a few interesting variations on the basic LOC approach. public domain Localizer as component of an ILS at KMEZ Arkansas What is a Localizer Back Course? So if the clouds are very low or the visibility is very bad, the LOC approach isn’t as nice as a full ILS. ![]() Notice that this approach only allows you to descend to 580 feet and up to 0.8 miles from the LOC antenna. The pilot must initiate a missed approach at 0.8 DME if the runway is not spotted. If you have an IFR GPS on board, it is the JIMNY waypoint.Īfter JIMNY, you descend to the straight-in or circling minimum descent altitude, 580 or 660 feet, respectively. That fix is identified by radar or DME from the localizer (6.9 DME). Once established inbound, which has a heading of 150º, you’ll maintain 2,000 feet until the Final Approach Fix (FAF). Once the plane is on the course, the controller can clear you for the approach. The controller will provide vectors and request that the pilot report “established localizer” or “established inbound.” In this case, you have intercepted the localizer and are receiving its signal. What is “Established Localizer” in Aviation? No other Initial Approach Fix (IAP) is provided. ![]() If you study the approach course on the chart, you’ll see that there is no way to get onto the course without help from an air traffic controller. There is a note that indicates that radar is required for this approach. Localizer codes always begin with the letter “I.” When receiving, you should hear the morse code ID of I-P-M-P. Setting the localizer frequency of 109.75 will tune your navigation radio to the right frequency. The ILS is discussed in detail in the FAA’s Aeronautical Information Manual, Section 1-1-9. Visual elements, like special runway markings and lights.Range information from marker beacons, NDBs, or fixes (VOR, DME, RNAV).Airliners and corporate jets with advanced autopilots can even auto-land on runways with a fine-tuned ILS.Īn Instrument Landing System combines four components. The ILS is an amazing piece of engineering that allows aircraft to fly all the way to the runway threshold with zero visibility in some cases. What is ILS? The Instrument Landing System On a non-precision approach, pilots can only descend to about 600 feet above ground level, although the exact number depends on obstacles and the area’s topography. These approaches don’t provide vertical guidance, so the pilot cannot fly as close to the ground without seeing the airport first. If you fly a LOC approach-or any non-precision approach-the tolerances are not as good. An ILS is the most accurate so that the pilot could be in the clouds down to 200 feet or so off the ground. ![]() And since they’re very precise, the plane can descend very close to the runway-within 200 feet of the ground-before the pilot needs to look outside to see the runway.Įvery instrument approach comes to a point where the pilot needs to see the runway to land-the more accurate the approach system, the longer that can be held off. That extra information helps a pilot navigate accurately. But the LOC can be used on its own, as well.Īn ILS is a precision approach that provides vertical guidance to the runway. It is the part that provides course guidance to the runway. Editorial Team On board VOR display with CDI What is the Difference Between ILS and Localizer?Īs mentioned above, the LOC is integral to every ILS approach. ![]()
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