文档介绍：ILS Approach Nomenclature ? ILS ? Converging ILS – The ILS "converges " with another approach and thus has higher minimums. Usually if there are two converging approaches the ATIS will broadcast that converging approaches are in effect. ? ILS or LOC ? ILS LOC ONLY N/A ? ILS Y & Z designators indicate important differences (IAP ’ s, FAP ’ s, MAP ’ s, FAC ’ s, Minimums, etc.) between multiple approaches to the same runway using the same base navigation equipment – ILS – RNAV/GPS – VOR – NDB ? Generally , Z’ s have the lower MDA ’ s/DA ’s 1 ILS - Instrument Landing System ? Most accurate approach typically available - lower minimums - height and visibility ? Typically approximate 200 feet AGL minimum before visual contact with the runway environment is required ? Offers horizontal, range and vertical guidance ? Displayed on the Course Deviation Indicator ( “ CDI ”), Horizontal situation Indicator ( “ HSI ”) or glass panels ? It is a “ precision approach “ because it has vertical guidance – Approaches with only horizontal (lateral) guidance are referred to as non-precision approaches 2 3 ILS - Instrument Landing System ? Required equipment – CDI with glideslope display, HSI or glass cockpit display – You also often need a marker beacon receiver to indicate passage over ground components of some ILS – An ADF or RMI, is also useful for orientation on some approaches, but typically are not required for an ILS approach 3 Information Received Range information is received from outer and middle markers and sometimes an inner marker beacon Guidance information - Vertical from glide slope - Lateral or azimuth from localizer 4 ILS approaches also have visual guidance information: approach lights, touchdown and centerline lights, runway lights ILS Ground Radio Equipment ? Localizer – Provides "left/right" azimuth guidance. Think of it as the same as the VOR needle - just more sen