Hi guys
here some infos about the philosophy of making automated landings on a B744 and the callout "alert height"
the 200 ft RA " alert height " callout is a part of CAT3 approaches WITHOUT a DH.
when you make an approach without DH, your minimums are according to your A/C type and operator and could be for example 0 ft - 75 m
at 200 ft RA, PNF/CM2 makes the call out "alert height" and if no failures, warnings or etc exist, PF/CM1 calls out "continue"
after this point a go around is mandatory only in very few cases
1. tower calls for go around
2. A/P disconnects
3. LOC or GS deviation are out of range, wich is indicated by flashing scales
even a lost of A/THR would not be a mandatory go around, CM2 would just call at 20 ft for "Retard" to remind CM1 to close the throttles.
when CAT3 without DH was introduced and we trained it in the sim, it was a kind of spooky. Even if you lost all your CRTs on CM2 side below "alert height" you were supposed to shut up and continue... but you get used to it...
lars