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Features January 2020 Issue

Backing Up GPS

Backing Up GPS

We’ve talked a lot about MON as a GPS backup, but that was the future. Well, that “future” is upon is. Perhaps you’d like to know what to expect.

The MON will remain until an advanced system emerges that can seamlessly recover from a GPS failure. Until 2014 the FAA advanced a system that provides alternate positioning, navigation, and timing (APNT) as GPS provides PNT. In 2015 APNT research was pushed into NextGen’s far term, 2026-2030. Once the MON is complete, the FAA plans to re-evaluate existing VORs, but at that point, APNT research will just be getting off the ground. The bottom line: some VOR navigation will be with us for years to come. You’d be well advised to keep your VOR navigation skills sharp.

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