ILSZ Rwy 27 Appch charts
Join Date: Oct 2001
Location: Kelsterbeach
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In some countries, there are different procedures designed around an ILS.
For example, there might be a procedure turn based on tracking an NDB bearing outbound to somewhere, and then an interception of the localizer - and this will get an identifying letter - "Z" in this case. Another procedure might lead to the glide slope intercept directly from a VOR that is not co-located to the above mentioned NDB. This procedure might then be called ILS "Y".
Occasionally there might also be different tracks to be flown when going around, based on the letters identifying the ILS.
Other countries will rather use the "via" or "transition" phraseology to differentiate different procedures around common approaches.
For example, there might be a procedure turn based on tracking an NDB bearing outbound to somewhere, and then an interception of the localizer - and this will get an identifying letter - "Z" in this case. Another procedure might lead to the glide slope intercept directly from a VOR that is not co-located to the above mentioned NDB. This procedure might then be called ILS "Y".
Occasionally there might also be different tracks to be flown when going around, based on the letters identifying the ILS.
Other countries will rather use the "via" or "transition" phraseology to differentiate different procedures around common approaches.
Join Date: Mar 2008
Location: London
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multiple approaches count backwards
If there are multiple approaches of basically the same type but with subtle differences (NDB, VORTAC etc involved) they are indicated alphabetically but starting from z then y all the way I suppose to a.
In Australia, typically this would refer to distances based on different DMEs, ILS Y might be based on the ILS DME, where as ILS Z would be exactly the same procedure but distances would be taken from the VOR/DME.
Useful if DME is mandatory for the procedure, eg no outer marker due to being over water. You can still fly the ILS if its DME fails.
Useful if DME is mandatory for the procedure, eg no outer marker due to being over water. You can still fly the ILS if its DME fails.
Join Date: Feb 2000
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In Italy there are P,S,T and Q which I can only guess mean Primary, Secondary, Tertiary and whatever the same is for four in Italian.
Only my guess though!
quaternary
Only my guess though!
quaternary
Last edited by JAR; 9th Oct 2008 at 15:02.
Join Date: Sep 2007
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many years before , for multiple app, on the same rwy, same type of app and same guidance, they used ILS 2 (no link with cat ll), but for no confusion with circling VOR-A, par example, they changed in letters from the end of alphabet X;Y;Z
