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2 Answers

Un-timed LOC approach

Asked by: 2051 views ,
Instrument Rating

 First I would agree with may other with if one component of the approach fail unexpectedly why would you trust that other components are stable.

Second, I am looking at the “ILS or LOC RWY 25” at Jamestown, NY (JHW) the current  plate provides no timing, and makes no mention of any other method to identify the MAP. I checked back in a 2014 TPP, and at that time, timing was provided. The minimum, and a few other small changes have been made on the plate, but nothing explains how to id the MAP, other than fly past the LOC.

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2 Answers



  1. John D Collins on Aug 28, 2018

    The Jeppesen chart has a timing table. DME can be used or the timing table. The FAA chart is missing the timing table and is probably in error. You can report this to the faa at https://www.faa.gov/air_traffic/flight_info/aeronav/chart_discrepancies/

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  2. Mark Kolber on Sep 03, 2018

    I agree with John that it is likely a charting error. But I will point out that there is “nothing” that explains how to ID the MAP. There are three.

    1. 0.2 DME
    2. The MAP waypoint if you load the approach in an IFR certified GPS.
    3. 6.4 NM from the FAF at your groundspeed (if you want to do the math). The timing table is not regulatory; if is a convenience provided by the chart publisher based on the FAF to MAP distance. If you compare the Jepp and FAA timing tables for an approach, you’ll see they are different in terms of the groundspeeds they calculate for you.

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