FlightPathOBN:
From your Post #92:
To be clear, that diagram from the other post is from 8260.52, RNP....illustrating one method to avoid an obstacle by raising CG. Getting this approved is virtually impossible.
The FAA the RNP AR procedures designers routinely use climb gradient missed approach procedure, and more than a few to the max of 425 feet per mile. No approval is required because it is permitted by Chapter 4 of 8260.52.
And, from your Post #94:
Good comment! When you look through and try to design procedures to meet all of the applicable rules, you find many conflicts. The FAA exempts themselves on the rules when designing procedures, but unless you are able to dig into the 8260 forms, you dont know what they have exempted.
I peruse IAPs of interest to my organization when they are in coordination. There are occasionally Flight Procedures Standards Waivers, but they are relatively few, and must document an equivalent level of safety (provided for in 8260.3B). I know of no "exemptions," though.