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Features February 2016 Issue

GPS Backup Strategies

With MON, youíre never over 100 miles from an airport with a ground-based approach.

GPS Backup Strategies

General Aviation is increasingly dependent on GPS. So much so, in fact, that the FAA is getting rid of many VORs. But, what if the satellites stop working?

In the October 2015 issue of IFR, I noted that the VOR reduction plan included a provision for something called the Minimum Operational Network, or MON. The FAA says that MON is specifically aimed ďat lower-end GA IFR aircraft in case of a GPS outage.Ē I added that MON is a transitional strategy to get to something called APNT, or Alternate Positioning and Timing. Letís dig into this and explore the GPS backup support you can expect in the future as we transition from terrestrial to satellite navigation.

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