Revised and updated April 2019 to include GLONASS and Galileo GNSS (Global Navigation Satellite systems) and an updated list of mapping software and other resources, as well as
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Grand Canyon Tips
Revised and updated February 2018: Grand Canyon Tips: The Local’s Guide to Avoiding the Crowds and Getting the Most Out of Your Visit
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Updated February 2015: Exploring with GPS
Exploring With GPS: A Practical Field Guide for Satellite Navigation.
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Updated January 2015
Both the Kindle and print editions were revised and updated January 2015 to cover Android Kitkat 4.4.4. For coverage of Lillipop 5.02, watch for my forthcoming book, Running