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Is PAPI required for ILS?
“If an ILS approach is available, fly the ILS and use VASI or PAPI for the visual portion of the approach.” “If an ILS approach is not available, a nonprecision approach supported by a VASI or PAPI should be the preferred option.”
How does a glide slope indicator work?
A glide slope station uses an antenna array sited to one side of the runway touchdown zone. The GS signal is transmitted on a carrier signal using a technique similar to that for the localizer. The centre of the glide slope signal is arranged to define a glide path of approximately 3° above horizontal (ground level).
Why are PAPI lights installed on the runway?
If the runway has an electronic landing system glide slope already established, the PAPI is installed as described in paragraph 502 so that the visual glide path angle will coincide with the electronic glide slope. Flying at or above the PAPI lights will guarantee a safe approach and obstacle clearance in the area.
Why does a Papi have different glide slope than an ILS?
Some pilots are reporting the glide slope on our PAPI is not coinciding with the glide slope on our ILS even though FAA did a flight check of our PAPI’s. Are there any reasons why a PAPI and ILS would indicate different approach glide slopes?
When to use a steeper angle for Papi?
The ILS provides for obstruction clearance in a 3-6 degree angle on a 3 degree glide path. Therefore, if there are obstructions in the PAPI clearance area (e.g. a tower off to the side of the rwy) that don’t exist in the narrower ILS clearance area, the PAPI will have to be a steeper angle.
What’s the glide slope of a Papi at Paris de Gaulle?
At various airports e.g Paris De Gaulle (Lfpg), the PAPI’s are set for cat D I.e B747, so the medium to light A/c class, will on a Cat 1 approach, appear to below PAPI 3% glide angle. Thanks for contributing an answer to Aviation Stack Exchange!