modesto2
Posts: 2669
Joined: Sun Jul 16, 2000 3:44 am

Ceiling And RVR For CAT I, II, III

Fri Jul 27, 2001 6:23 am

I apologize because I know this information has been posted (but I can't find it). What are the ceilings and RVRs for the different approaches? Thanks.
 
SQ325
Posts: 1274
Joined: Wed Jul 18, 2001 7:54 pm

RE: Ceiling And RVR For CAT I, II, III

Fri Jul 27, 2001 9:48 am

Cat1= RVR 550m ceiling 200ft
Cat2= RVR 300m ceiling 100ft
Cat3= RVR 100m??? ceiling 60ft to 0ft Cat 3C
 
OPNLguy
Posts: 11191
Joined: Tue Jun 15, 1999 11:29 am

RE: Ceiling And RVR For CAT I, II, III

Fri Jul 27, 2001 9:47 pm

From the AIM at: http://www.faa.gov/ATpubs/PCG/pcg-i/pcg-i.html

ILS CATEGORIES

- 1. ILS Category I. An ILS approach procedure which provides for approach to a height above touchdown of not less than 200 feet and with runway visual range of not less than 1,800 feet.

- 2. ILS Category II. An ILS approach procedure which provides for approach to a height above touchdown of not less than 100 feet and with runway visual range of not less than 1,200 feet.

- 3. ILS Category III:

a. IIIA.-An ILS approach procedure which provides for approach without a decision height minimum and with runway visual range of not less than 700 feet.

b. IIIB.-An ILS approach procedure which provides for approach without a decision height minimum and with runway visual range of not less than 150 feet.

c. IIIC.-An ILS approach procedure which provides for approach without a decision height minimum and without runway visual range minimum.
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
me
Posts: 220
Joined: Sat Oct 21, 2000 4:57 am

RE: Ceiling And RVR For CAT I, II, III

Tue Jul 31, 2001 2:09 am

Ceiling is not a requirement for any ILS approach. Visibility must be at or above the minimum published for the approach for an airliner to pass the finial approach fix.
Example:
ILS CAT I approach with minimums of 200ft and 1/2 mile vis can be flown with the ceiling below 200 feet but not with the vis below 1/2 mile.
 
sabenapilot
Posts: 2442
Joined: Sat Feb 26, 2000 6:18 pm

RE: Ceiling And RVR For CAT I, II, III

Tue Jul 31, 2001 11:08 pm

Me,
I think OPNLguy ment DH i.s.o. ceiling.

Anyway,
a ceiling is sometimes required on ILS approaches!
for instance: Brussels' simultaneous dependant ILS approaches to the RWYs 25L and 25R.

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