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How does the ILS (Instrument Landing System) work? Explained by CAPTAIN JOE : Video

Two Airlines Narrowly Avoid Crashing.

ILS systems work by sending two beams able to be picked up by aircrafts radios and instrumentation that guide the aircraft down to a safe landing spot in the runway one guides you down on the altitude to the runway in a sort of slope (that’s why it’s called a GLIDESLOPE) and the other guides you into the centreline of a runway from the moment that you hear a pilot say LOCALIZER ALIVE the system is guiding him into the extended centreline of the runway. This is done by a needle on the bottom of the horizontal indicator on the PFD for modern, electronic commercial airliners. And for others it’s done by mechanical gauges.

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The GLIDESLOPE works with the same principle, except it shows that needle on the vertical side of the artificial horizon. If you’re to low the needle will tell you by moving up, telling you to climb and if you’re too high it will move down telling you to descend. Aircraft capable of auto land can use the autopilot to interpret this information and make much better adjustments than the pilots can. This is why the auto land is only used in certain conditions that the pilots couldn’t control the plane safely in. I.E- low visibility.

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He is an aviation journalist and the founder of Jetline Marvel. Dawal gained a comprehensive understanding of the commercial aviation industry.  He has worked in a range of roles for more than 9 years in the aviation and aerospace industry. He has written more than 1700 articles in the aerospace industry. When he was 19 years old, he received a national award for his general innovations and holds the patent. He completed two postgraduate degrees simultaneously, one in Aerospace and the other in Management. Additionally, he authored nearly six textbooks on aviation and aerospace tailored for students in various educational institutions. jetlinem4(at)gmail.com

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