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Airport CAT And Acft Requirement  
User currently offlineLMML 14/32 From Malta, joined Jan 2001, 2565 posts, RR: 6
Posted (11 years 1 month 2 weeks 4 days 21 hours ago) and read 2547 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
 
User currently offlineGoboeing From United States of America, joined Jun 2000, 2698 posts, RR: 14
Reply 1, posted (11 years 1 month 2 weeks 4 days 21 hours ago) and read 2525 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


User currently offlineMjzair From United States of America, joined Nov 1999, 401 posts, RR: 0
Reply 2, posted (11 years 1 month 2 weeks 4 days 21 hours ago) and read 2511 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]

User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 1 month 2 weeks 2 days 8 hours ago) and read 2478 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


User currently offlineAM From Mexico, joined Oct 1999, 589 posts, RR: 2
Reply 4, posted (11 years 1 month 1 week 6 days 7 hours ago) and read 2417 times:
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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."
User currently offlineCovert From Ghana, joined Oct 2001, 1451 posts, RR: 2
Reply 5, posted (11 years 1 month 1 week 6 days ago) and read 2411 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 !
User currently offlineLMML 14/32 From Malta, joined Jan 2001, 2565 posts, RR: 6
Reply 6, posted (11 years 1 month 1 week 5 days 6 hours ago) and read 2389 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?



User currently offlineMjzair From United States of America, joined Nov 1999, 401 posts, RR: 0
Reply 7, posted (11 years 1 month 1 week 5 days 1 hour ago) and read 2361 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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