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Ceiling And RVR For CAT I, II, III  
User currently offlineModesto2 From United States of America, joined Jul 2000, 2783 posts, RR: 5
Posted (12 years 11 months 3 weeks 4 days 8 hours ago) and read 18808 times:

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.

4 replies: All unread, jump to last
 
User currently offlineSQ325 From Germany, joined Jul 2001, 1449 posts, RR: 7
Reply 1, posted (12 years 11 months 3 weeks 4 days 4 hours ago) and read 18789 times:

Cat1= RVR 550m ceiling 200ft
Cat2= RVR 300m ceiling 100ft
Cat3= RVR 100m??? ceiling 60ft to 0ft Cat 3C


User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 2, posted (12 years 11 months 3 weeks 3 days 16 hours ago) and read 18769 times:

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.


User currently offlineMe From United States of America, joined Oct 2000, 220 posts, RR: 2
Reply 3, posted (12 years 11 months 3 weeks 12 hours ago) and read 18736 times:

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.


User currently offlineSabenapilot From Belgium, joined Feb 2000, 2714 posts, RR: 47
Reply 4, posted (12 years 11 months 2 weeks 6 days 15 hours ago) and read 18726 times:

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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