PPRuNe Forums - View Single Post - Jeppesen Approach Charts Non Precision DA
Old 2nd Sep 2011, 08:19
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aterpster
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172 Driver:

Affirm, here is one example. KCRQ GPS RWY 24. And it's a significant difference, 287 ft in MDA. What is the reason for that? aterpster? FlightOBN?
Non-RNP AR VNAV criteria has ILS like vertical clearance from the P-FAF inbound, but with larger margins to account for the lowest common denominator of IFR BARO VNAV equipment, and the DA forces the visibility to be higher than LNAV. LNAV is simply 250 feet of obstacle clearance from the FAF to the runway.

The "name of the game" for this IAP is LPV, which uses the exact lateral and vertical surfaces of ILS and is temperature independent. There is a revision pending, which is on hold at the present time.
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