Cat III NO DH in France
Transparency International
Thread Starter
Cat III NO DH in France ?
Whereas we normally can do a Cat IIIb to 0 feet DH and 75 meters, I've recently been told that Cat III NO DH is not permitted in France ! (?).
Could someone in this esteemed group please enlighten me - preferable with references to an on-line document - of the truth of this matter?
[added b]
Could someone in this esteemed group please enlighten me - preferable with references to an on-line document - of the truth of this matter?
[added b]
Last edited by dusk2dawn; 23rd May 2010 at 19:12. Reason: [added ?]
Transparency International
Thread Starter
The advantage of 0 DH is..... well why have a DH when the required visibility is only 75 meters? For the past 10 years we've done CAT IIIb to 0' and 75m - even using HUD without autopilot.
But I would like to learn why you think a DH > 0' is some kind of an advantage over 0 DH?
However, when I search the French AIP, the only thing I find concerning CAT III is under GEN 1-7 Differences...A & B under Annex 10 (?) wich states that "For category III A and B precision approaches, a decision height is always required."
But what is the required DH? Is 5' OK?
But I would like to learn why you think a DH > 0' is some kind of an advantage over 0 DH?
However, when I search the French AIP, the only thing I find concerning CAT III is under GEN 1-7 Differences...A & B under Annex 10 (?) wich states that "For category III A and B precision approaches, a decision height is always required."
But what is the required DH? Is 5' OK?
Guest
Posts: n/a
Greetings,
DH for CATIIIB is mainly for you to assess if the Aircraft is properly positioned for AUTOLAND, and it is so low that if you Go Around it will be more a Touch and Go than a Go.
So pratically very little difference between DH or NO DH.
Some guys then will mix up NO DH, (no visual cues required) with I can land with RVR 0 if I have NO DH.
, because 75 Meters is the minimum RVR enabling Fire and Rescue team to reach the Airplane with 3 minutes MAX, in case things turned bad, and/or enabling you to taxi out the Airplane.
DH for CATIIIB is mainly for you to assess if the Aircraft is properly positioned for AUTOLAND, and it is so low that if you Go Around it will be more a Touch and Go than a Go.
So pratically very little difference between DH or NO DH.
Some guys then will mix up NO DH, (no visual cues required) with I can land with RVR 0 if I have NO DH.
, because 75 Meters is the minimum RVR enabling Fire and Rescue team to reach the Airplane with 3 minutes MAX, in case things turned bad, and/or enabling you to taxi out the Airplane.
Last edited by kijangnim; 23rd May 2010 at 09:56.
Transparency International
Thread Starter
OK, so what DH is the minimum acceptable to the French authorities when you conduct a CAT IIIb in France and where in the French regulations can you find it?
Transparency International
Thread Starter
I'll be looking forward to that!
Still no reference (doesen't have to be english) to the minimum DH required for a CAT IIIB in France?
Still no reference (doesen't have to be english) to the minimum DH required for a CAT IIIB in France?
Join Date: Jan 2004
Location: Far away from LA
Posts: 1,032
Likes: 0
Received 0 Likes
on
0 Posts
https://www.sia.aviation-civile.gouv...2010_04_26.pdf
page 118...
then https://www.sia.aviation-civile.gouv...EA_A_06_V2.pdf
good reading,
CAT 3 minima depends on the assesment of the approach..untill AF has done the work...good luck
page 118...
then https://www.sia.aviation-civile.gouv...EA_A_06_V2.pdf
good reading,
CAT 3 minima depends on the assesment of the approach..untill AF has done the work...good luck
Join Date: Oct 1999
Location: Europe
Age: 51
Posts: 159
Likes: 0
Received 0 Likes
on
0 Posts
If I remember correctly, we use 27ft DH in France CATIIIb, although the radalt can only display in 10ft increments on the approach, so it is a bit of a useless excercise, by the time you have to decide you have almost touched down.