April 1998 Issue

GPS Switchology

These little gizmos seem to double the price of GPS installations. Here’s why. (P.S. You gotta have ‘em.)

When we finally bite the bullet and take the ol’ air machine in for a shiny new IFR-approved GPS, we usually focus on the features and price of that wondrous box. What sort of display, how many waypoints and so on. Things that make us buy Brand B, over Brand G or Brand T.

Then we get a look at the bottom line for the installation quote. That’s about the time NOAA records a weather phenomenon over the airport where the barometric pressure drops two inches and the temperature changes 60 degrees in 30 seconds.

The bottom line price for this GPS gizmo may be double the $4500 unit cost. One “option” that accounts for this cost run-up is the GPS/Nav switching accessory. What is it and...

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