JOEL MCNAMARA GPS for Dummies
Here's what you need to make the most of that handy, portable GPS gadget and all its amazing features. Includes how-to info for digital maps as well.
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Here's what you need to make the most of that handy, portable GPS gadget and all its amazing features. Includes how-to info for digital maps as well.
The Geocaching Handbook is your complete introduction to this fascinating outdoor activity.
This book explains how to use your GPS receiver, written in layman's terms.