Archived

This topic is now archived and is closed to further replies.

moey124

what is the difference between ILS Z & Y?

Recommended Posts

i was doing a apprroach into YSSY.. and it told em to land at 30L and i clicked ILS Z.. but when i clicked the approach switch it ddidnt have glideslope... so i am wondering if it has to do with ILS z & Y.. cause i was at the right altidude etc... can someone explain to me what is the differenc ebetween ILS Z OR Y ? thanks

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Found this:

 

"8.5.1.3.2 The single letter suffix shall be used as follows: 

a) when two or more navigation aids of the same type are used to support different approaches to the same runway; 

b) when two or more missed approaches are associated with a common approach, each approach shall be identified by a single letter suffix; 

c) if different approach procedures using the same radio navigation type are provided for different aircraft categories; and 

d) if two or more arrivals are used to a common approach and are published on different charts, each approach shall be identified by a single letter suffix. If additional radio navigation aids are required for the arrival, they 
shall be specified on the chart’s plan view. For example: 

ILS Z RWY 20 (“DNA VOR Arrival” shown in the plan view) 
ILS Y RWY 20 (“CAB VOR Arrival” shown in the plan view)"

 

 

 

I'm sure some others here can elaborate further.

Share this post


Link to post
Share on other sites

You hit it on the head.

 

Two ILS approchaes to the same runway, but with differences.

 

Why Z, X, etc..? To help prevent confusion with SID/STAR that are ABC1A, etc..

 

Best regards,

Robin.

Share this post


Link to post
Share on other sites

I don't have your charts with me, but have a look at the missed approach procedure.

It could be different depending on what letter (Y/Z) you will have to fly

Share this post


Link to post
Share on other sites

Look closely at the plates at "NAVAID RQ":

 

the 34L ILS-Z requires the ISN DME

the 34L ILS-Y requires the SY DME

 

(top right hand corner of the plate)

Share this post


Link to post
Share on other sites

Can I ignore this?  I only ever have one missed approach: nose first into the nearest piece of tarmac.

Share this post


Link to post
Share on other sites

Can I ignore this?  I only ever have one missed approach: nose first into the nearest piece of tarmac.

 

If you fly offline you can do what ever you want. Flying online however is a different story....

Share this post


Link to post
Share on other sites