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Wow, that really clears up my question. One other side question, i you join the loc above the gsia and cleared for the approach, do u descend to the gsia before you intercept the gs (kinda like a step down fix) or just wait for the glideslope?
-- I've seen approaches where staying on the glideslope way out will put you below some of the stepdowns.
I'm skeptical that this is true.
The Maximum descent gradient for an intermediate segment is 300 ft/nm, while a glideslope slopes at 3 degrees which is 318 ft/NM. If both of these conditions are met, it's impossible to a point in the intermediate segment to be above the GS. I suppose that it's possible that a lower than standard GS...
Thanks, you two have been very helpful
KLAX Landing West, Paradise 4It's a fuzzy memory at this point, but it was one of the BOS ILSs years ago. It was changed quite a while back, but I remember one of a co-worker getting chewed out for it. But it was second-hand info, and you know how that goes... My experience in Boston is that as long as you don't slow down, they're happy.
Hmm. I just looked at Boston, and all the ILSs are 3 degrees exactly. So either the glideslope was changed (unlikely), the stepdowns didn't meet the criteria you mention and were fixed (possible), or the story I got was completely bunk (most likley).
I'll dig around and see if I can find an example of one where this would bite you, but it looks like it's not the case in BOS, currently anyway. I'll keep my eyes open.