Originally Posted by
Capn Bloggs
If you're implying that it was an all smooth and dandy 3.15° approach, FR24 tells a completely different story.
No, it doesn't
(apologies, mods, for the size of the image, which shows each of the two approaches, from roughly 2500' Mode C at the extreme left)
If there's more than 50-75' difference in the heights at any given point along the respective approaches, then that's not supported by the data.
Rider: I'm not implying anything about the accuracy of FR24, merely pointing out what appears to me to be poor/misleading interpretation of the FR24 info.
Yours is the poor/misleading interpretation - neither you nor I can deduce absolute heights AMSL from the data without knowing whether or not it has been corrected for QNH.
All you can do with the data is compare the values for the two approaches (see above).