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Cat III NO DH in France

Cat III NO DH in France

Old 19th May 2010, 18:32
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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]

Last edited by dusk2dawn; 23rd May 2010 at 19:12. Reason: [added ?]
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Old 19th May 2010, 20:44
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I confirm the DGAC requirement for CAT3B with DH only
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Old 20th May 2010, 07:52
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Sorry, I think I do not quite follow you: is ILS CAT IIIb NO DH permitted or not permitted in France?
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Old 20th May 2010, 11:12
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No DH is NONO you have to have a DH, furthermore what advantage do you see in not having a DH on a CATIII B?
 
Old 21st May 2010, 07:57
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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?
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Old 21st May 2010, 08:23
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kijangnim
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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.

Last edited by kijangnim; 23rd May 2010 at 09:56.
 
Old 21st May 2010, 08:52
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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?
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Old 26th May 2010, 11:37
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kijangnim
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Greetings
I have just heard that Air France is working on a proposal to have CATIII B no DH with DGAC, so just be patient
 
Old 27th May 2010, 18:04
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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?
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Old 4th Jun 2010, 10:22
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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
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Old 5th Jun 2010, 07:30
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Merci bocu!
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Old 2nd Jul 2010, 20:19
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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.
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Old 20th Dec 2021, 13:50
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Hi guys,

has anything changed since then regarding CATIIIB no DH in France?

Thanks.
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Old 20th Dec 2021, 15:39
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BDX MRS TLS CDG NTE LYS all 0 DH
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Old 21st Dec 2021, 05:42
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Originally Posted by deltahotel View Post
BDX MRS TLS CDG NTE LYS all 0 DH
BDX is not in France (Broadus, Montana, USA) but BOD (Bordeaux) is.

.
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Old 21st Dec 2021, 10:43
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Soz, but you know what I meant!
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