Separation in two CAT2 ILS runways
 

Has anybody experienced two adjacent paralled runway operating with CAT 2 ILS at the same time ? If yes ,what is the separation for the two aircrafts approach on two different runways ?

I have no experience with that kind of constellation, but I guess you need radarseparation on final. 3nm/5nm. Especially with parallel apps in IMC.

How far apart are the runway centrelines?

1525 meters ,is there any rules about this ?

There is the doc4444 requirement for wake turbulence separation if the parallel or near parallel rwy is 700 or less meters apart. But I guess thats for deps.

Yes,that is for deps .

But you say ILS CAT II. And we are talking LVP. I could not imagine to use anything but radar seperation.
Can I ask the reason for your question?

YYZ does it with runway 05 and 06L.

Separation is standard radar.
We can run parralel approaches so long as we have an "ILS monitor" position open. Aircraft will be established alongside each other on their respective localiser with 1000 vertical separation and won't be given the approach clearance till established on the localiser.

Spacing on final depends on what the tower needs.

What is LVP ?
I am an approach controller in BeiJing,China ,we have two adjacent runways can operate ILS CAT 2 ,but this is the first time we have met this situation in China ,and could not find any rules or regulations about is ,so that is why I asked.

caucatc - here is a link to a draft document dated 2004 on the subject of simultaneous operations on parallel runways.

http://www.icao.int/icao/en/anb/meet...003_app_en.pdf

I'm sure that there is more up to date information available but suggest that it is a good starting point for your research.

If you have a Precision Runway Monitor (PRM), you can run parallel approaches especially as you have 1525 metres between runway centrelines. Hong Kong has a spare one that they don't know how to use! I'm sure if you enquire with VHHH they will gladly lend it to you.

On the beach :ok:

Hi On The Beach
Are you a controller in HongKong ? We have PRM so we do not need to borrow one from HK ,haha.
Do you mean two aircrafts do not need to care about the separation even if those two runways are operating CAT 2 ILS at the same time ? What is the name of this regulation ?

At EHAM we are doing parellel approaches even under CAT3 circumstances. RVR less then 350m but more then 200m's. We have only one special tool called NTZ (Non transgression Zone). This is a small area between both ILS's. Once an aircraft enters this zone the aircraft's label will flash on all APP and TWR radar screens. If this is the case a special procedure will follow.

Hi Caucatc,

I retired from Hong Kong a few years ago. Have a read of this working paper (number 3) in the Air Navigation Conference document. There are many papers and quite a few are available in Chinese, which may interest you. Unfortunately the working paper on parallel approaches is only available in English at the moment. This document is a few years old now but does contain a great deal of valuable information.

AN Conf/11 - Documentation

Independent parallel approaches will depend on terrain around your airport. As Frank has said you need a non-transgression zone between the approach paths, which is monitored using a PRM. If an aircraft "blunders" into the non-transgression zone then the controller is required to intervene and turn either or both aircraft. If you have terrain, as they do in Hong Kong, then this makes independent parallel approaches impossible. So you have to resort to dependent parallel approaches, which involves off-setting the parallel approaches so as not to have aircraft side by side.

So, if you don't have any terrain constraints around your approach paths, then there are no separation considerations to be made and you can run parallel approaches in CAT I, II and III, depending on your local regulations.

Good luck and a Happy New Year, On the beach :ok:

Frank and On The Beach ,Thanks a lot !!
Wish you happy new year !!!!!!!!

LVP = Low Visibility Procedures
DOC4444 states that LVP is LVTO (Low visibility TKOF) and/or CAT II/III apps.

Where I work we use stopbars and procedural separation on the manouvering area. LVP is hell for the GND controllers.