Table of Contents
What is the difference between ILS Z and ILS Y?
The Y uses an RNAV TAA to join the procedure and requires GPS. The Z uses conventional ground navaids to join the procedure and requires either DME or radar. The two procedures can’t be charted on the same chart because the Z has an MSA defined whereas the Y does not.
What is a cat 2 ILS approach?
FAA definition. A category II approach is a precision instrument approach and landing with decision height lower than 200ft (60m) but not lower than 100ft (30m), and a runway visual range less than 2400ft (800m) but not less than 1200ft (350m).
What is a CAT 1 ILS approach?
A CAT I approach is your basic, run of the mill, “two hundred and a half” ILS approach. Minimums can be higher for this approach, but not lower. It can be hand flown, meaning no autopilot is required and it can be done with theonboard equipment found on most General Aviation instrument qualified aircraft.
What are ILS categories?
ILS categories
| Category | Decision height |
|---|---|
| I | > 200 ft (60 m) |
| II | 100–200 ft (30–60 m) |
| III A | < 100 ft (30 m) |
| III B | < 50 ft (15 m) |
What does it mean when a runway has multiple ILS procedures?
When a runway has more than one ILS procedure (typically designated X, Y, Z) ATC will tell you to expect and clear you for that specific approach. For example: Expect ILS-zulu approach runway 27 and Cleared ILS-yankee approach runway 05
How do I select a runway for my Flight?
If the visibility and ceiling conditions are low, we recommend selecting a runway with an IFR precision approach available (like ILS). If you do not have a precision approach, select the runway with an IFR approach with the lowest minima. If the wind speed is high, we recommend selecting the runways with headwind.
How many runways should I select for an IFR approach?
At some airfields, there is no IFR approach published for one or several runways, or an IFR approach is published only for one side of a runway. We recommend to select a least one active runway with an IFR approach published when the wind favours this selection.
What is the difference between ILS y and ILS Z?
When an airport has multiple ILS approaches to the same runway (usually labelled ILS-Z, ILS-Y, ILS-X.), they all end up using the same ILS for that runway, but they differ in how you fly the approach until final. Consider e.g. KTUP, which has an ILS-Y and ILS-Z approach to runway 36.