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Two minima for same approach

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Instrument Rating

Looking at the BJC ILS 30R approach plate, there are two sets of minima for the S-ILS 30R approach: 200 1/2 (with an asterisk), and 500 1 3/8. Is the asterisked minimum only for aircraft capable of the 240'/nm climb gradient? Or does it refer to the asterisk about the inoperative MALSR and Denver altimeter? Or something else altogether? The  notes on this plate are a real mess.

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1 Answers



  1. jeff on Apr 12, 2016

    Correct. The first set of minimums require that the aircraft can maintain a climb gradient of 240′ per NM up through 9700 on the missed approach segment. (Not necessarily an easy the thing to do if you happen to loose an engine)

    In addition, if using the Denver altimeter setting, the visibilty requirement is increased to 1 mile from 1/2.

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