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Dual Minimums
18.08.2006
Submission:
I recently came across a procedure that had two minimums for a CAT II ILS procedure (same approach plate).
One minima unrestricted 100 ft DH/RVR 350 and the other was restricted 150 ft DH/RVR 550.
I don't understand why the procedure would have two minima if the OAS would support the lower minima.
Gregory Harrison
Jeppesen
USA
Answer or Commentary:
I.W.
Possibly it has to do with the missed approach after the 1000 ft precision segment of the ILS. Obstacles outside the OAS could require 2 different missed approach climb gradient and subsequently 2 different OCA/H values.
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