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22nd March 2014 | 04:28

#46 (permalink)

Capn Bloggs

Joined: Mar 2002

: ATPL

Posts: 9,226

Likes: 996

From: Seat 1A

Quote:

What is ALT AD of 17? I note all of the altitudes have 17 added to them...
600 (583), 2000 (1983), etc..

Must be a French thing. Means Aerodrome Altitude 17ft. Threshold altitude is 6ft. The bracketed values are the "AAL" heights.

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