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Airport CAT And Acft Requirement

LMML 14/32 From Malta, joined Jan 2001, 2560 posts, RR: 7
Posted (9 years 10 months 2 weeks 6 days 13 hours ago) and read 2160 times:

What are the WX minimas needed for CAT I, II and III airfields for B732, B733 and A320?

7 replies: All unread, jump to last

Goboeing From United States of America, joined Jun 2000, 2636 posts, RR: 12
Reply 1, posted (9 years 10 months 2 weeks 6 days 12 hours ago) and read 2138 times:

Usually, CAT I minimums are 200' AGL, CAT II is 100' AGL, and CAT III I don't know much about but 50' AGL comes to mind, but there's other things involved for III.

Nick

Mjzair From United States of America, joined Nov 1999, 394 posts, RR: 1
Reply 2, posted (9 years 10 months 2 weeks 6 days 12 hours ago) and read 2124 times:

ICAO -

CAT I
DH - 60m 200FT
RVR - 550m 1800FT

CAT II
DH - 60-30m 200-100FT
RVR - 350m 1200FT

CAT IIIA
DH Lower than 100FT or no DH
RVR - 200m 700ft

CAT IIIB
DH - Lower than 50ft or no DH
RVR - 200-50m 700-150Ft

CAT IIIC
No DH
No RVR

[Edited 2003-08-06 05:19:43]

B747skipper From , joined Dec 1969, posts, RR:
Reply 3, posted (9 years 10 months 2 weeks 3 days 23 hours ago) and read 2091 times:

In Cat.IIIa operations (747) the "alert height" generally occurs between 30 and 50 feet AGL... the approach is flown on autopilot with autoflare capability. The aircraft we so operate are technically capable of Cat.IIIb operations (again autopilot) but the 747 is not approved to these minimums.
xxx
There are two Cat.II minimums, (I call them the 150 and the 100 Cat.II DH). One requires full equipment working, the other permits approaches to the higher minimums with some equipment inoperative...
xxx
Happy contrails Smile

(s) Skipper

AM From Mexico, joined Oct 1999, 578 posts, RR: 2
Reply 4, posted (9 years 10 months 2 weeks 22 hours ago) and read 2030 times:

When can the autopilot be disconnected in CAT II and CAT III approaches?

"... for there you have been and there you will long to return."

Covert From Ghana, joined Oct 2001, 1436 posts, RR: 2
Reply 5, posted (9 years 10 months 2 weeks 15 hours ago) and read 2024 times:

When can the autopilot be disconnected in CAT II and CAT III approaches?

Reread the last posts, that is the decision height, or minimum.

covert

thank goodness for TCAS !

LMML 14/32 From Malta, joined Jan 2001, 2560 posts, RR: 7
Reply 6, posted (9 years 10 months 1 week 6 days 21 hours ago) and read 2002 times:

Just learnt that our company has established its own minimas:

CAT I: 800mtrs
CAT II: 300mtrs
CAT III: 200mtrs

This is for B737 only. Don't know what the minimas are for the Airbus yet.

Mjzair mentioned CAT IIIA and CAT IIIB. What is the difference?

Mjzair From United States of America, joined Nov 1999, 394 posts, RR: 1
Reply 7, posted (9 years 10 months 1 week 6 days 17 hours ago) and read 1974 times:

Lmml 14/32:

The difference is in the RVR or Runway Visual Range.

IIIA Must be at least 200m

IIIB Can be 200m all the way down to 50m

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