lmml 14/32
Posts: 2358
Joined: Tue Jan 30, 2001 2:27 am

Airport CAT And Acft Requirement

Wed Aug 06, 2003 11:27 am

What are the WX minimas needed for CAT I, II and III airfields for B732, B733 and A320?
 
goboeing
Posts: 2428
Joined: Mon Jun 05, 2000 5:31 am

RE: Airport CAT And Acft Requirement

Wed Aug 06, 2003 12:04 pm

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
Posts: 354
Joined: Tue Nov 30, 1999 12:10 pm

RE: Airport CAT And Acft Requirement

Wed Aug 06, 2003 12:18 pm

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]
 
Guest

RE: Airport CAT And Acft Requirement

Sat Aug 09, 2003 1:10 am

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
Posts: 593
Joined: Sat Oct 02, 1999 8:49 am

RE: Airport CAT And Acft Requirement

Tue Aug 12, 2003 1:39 am

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
Posts: 1498
Joined: Sun Oct 21, 2001 1:02 am

RE: Airport CAT And Acft Requirement

Tue Aug 12, 2003 8:50 am

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
none
 
lmml 14/32
Posts: 2358
Joined: Tue Jan 30, 2001 2:27 am

RE: Airport CAT And Acft Requirement

Wed Aug 13, 2003 2:38 am

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
Posts: 354
Joined: Tue Nov 30, 1999 12:10 pm

RE: Airport CAT And Acft Requirement

Wed Aug 13, 2003 7:32 am

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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