ILS Question

Hi there I have a question about the ILS landing system. What is the correct MSL altitude to be flying at, at the begging of an ILS cone?
Thanks!

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Depends on the elevation of the airport. I normally go for 3000-3500ft + the elevation of the airport

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ok thanks!

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Hey!


Depends. If your airport has parallel runways then its better to enter at 2500 when you’re on the left runway and 3500 when you’re on the right runway. I normally go for 3000 when its a standard-single runway airport.

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It also depends on the descent of the glide slope, if it is more than the standard 3 degrees you should start higher. This is why its important to consult airport approach charts to find this information.

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One more thing. The other day I was landing at EGLL, and I was inbound for left traffic on the ILS. But I did not know what altitude to be at.
Thanks!

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Every airport is different. Search ICAO charts and you’ll find it. So for example “FACT charts“ in google 👍

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Anywhere in the UK is generally flat. 2500-3500 AGL is always the way to go.

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Like @Tsumia 3000-3500 when entering the cone, and about 1500 feet when 5 NM out

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Ok one more thing. I was flying yesterday on a Unicom flying patterns. What should I not announce when remaining in the pattern?
Thanks!

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All you need to do is announce your positions (Crosswind, Downwind, Base, and Final). Nothing else for patterns!

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Ok thanks!
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Most IFATC let u go to 3500

Hi! If you want to be precise, you can use approach plates. You get the vertical profile with the altitude AMSL at which you should be at the start of the ILS cone as well as for the NDBs, VORs or fix before the cone.

Hope it helps

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You can do the following for all 3° glideslope approaches. 3 x distance in Nm from threshold x 100.

For example, if you are at 10Nm, you should be at 3 x 10 x 100 = 3000ft.

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