CATlllA&B Operations

[Spooky 1]

To clarify, the "Minimums" call from the GPWS is simply going to be heard at whatever height the RA bug is set at. It will be heard at either the DH or AH as appropriate. So, on a Cat IIIA/B-Land 3, with a 100' Alert Height (AH), you ignore the minimums call (since there are no minimums on this approach with an Alert Height vs. the RA Decision Height on a Cat II or Cat IIIA-Land 2 which does have "minimums" of ~50' AGL) We set the Cat II RA DH (~100') for a Cat IIIA/B-Land 3 (and get the "minimums" GPWS call) for a couple of reasons. 1) it is an advisory of reaching the alert height 2) in case of a malfunction restricting us to a Cat II approach, the bugs are already set. (We can hand-fly a Cat II as necessary and if you do end up hand-flying all of a sudden, the last thing you want to be doing is dialing the bug) If we revert from a Land 3 condition to a Land 2 condition, you just dial down the bug 50' and press. Clear as mud?

Gottcha. Just hace a hard time ignoring any minimums callouts and continuing on futher down to a lower altitude. Thanks!

 

[Spooky 1]

Easy with me as well as I have no books in front of me.

For CAL, Beer Belly and Groucho are spot on. Although I think Belly had a typo with 3B being an alert height as he mentioned 3A twice.

Okay Boeingman. I think I know where you work, so is it your company policy to use 50' for both CATlllb and a? I am assuming that you are not flying the -800 with the HUD installed?

 

[Big Beer Belly]

Easy with me as well as I have no books in front of me.

For CAL, Beer Belly and Groucho are spot on. Although I think Belly had a typo with 3B being an alert height as he mentioned 3A twice.

Checked it again ... no typo. To further clarify though, at UPS your approach choices are:

Cat I

Cat II to a DH of 100' (min)

Cat IIIa (Land 2) to a DH of 50'

Cat IIIa (Land 3) to a AH of 100'

Cat IIIb to a AH of 100'


RVR and equipment malfunctions will obviously dictate approach choice. Cat IIIb are flown to 300 RVR (where published) with no requirement to see anything prior to touchdown.

BBB