An Instrument Touchdown System (ILS) method is a precision method system that gives lateral and vertical steerage to an plane throughout its closing method to touchdown. It’s utilized in low-visibility situations when the pilot can’t see the runway. ILS approaches are sometimes used at bigger airports.
There are two primary varieties of ILS approaches: precision approaches and non-precision approaches. Precision approaches present lateral and vertical steerage to the plane, whereas non-precision approaches present solely lateral steerage. ILS approaches are categorized based mostly on their accuracy, with Class I being the least correct and Class III being probably the most correct.