I know from the IPH that in RNAV approach charts the presence of the grey shaded line in the profile view means "visual segment below MDA is clear of obstructions on the 34:1 slope." Then, what's the meaning of the same grey shaded line (ILS glide slope) in ILS charts, which typically start from the FAF and end at the end of runway? The same meaning as in RNAP approach charts?
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