May 30, 2007
Is Your GPS IFR Legal? Revised Advisory Circular creates misunderstandings about GPS utility.
The Federal Aviation Administration released an updated Advisory Circular (90-100A) in March that muddies the waters for pilots using IFR-approved GPS receivers in lieu of ADF and DME equipment for instrument approaches and en route fixes. In addition to being legal for non-precision approaches and, more recently with WAAS approval, precision approaches, modern IFR GPSes can be used to identify navigational fixes previously defined by NDBs and DME points. According to the…
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