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From Fellrnr.com, Running tips
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* '''GPS Pre-cache'''. Some newer watches will download the predicted positions of the GPS satellites for faster initial acquisition. This pre-cache works remarkably well, and the data is usually downloaded automatically when the watch is connected to the internet. However, the data is only valid for a few days, so after that time the device will fall back to the usual approach of scanning for satellites.
=GPS Accuracy=
[[File:Accuracy.jpgpng|none|thumb|600px|An infographic of [[GPS Accuracy]] of running watches. The top right corner represents the most accurate watches. (This graphic uses ISO 5725 terminology.)]]
=Using a Smartphone=
''Main article: [[Running With A Smartphone]]''
