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If you really do need exceptional accuracy, you could use the solution many Ingress players use - a good Android phone with a battery pack. In the game you often need accuracy of 2 or 3 metres - s...
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#1: Attribution notice removed
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System
·
2020-05-27T11:08:42Z (over 4 years ago)
Source: https://outdoors.stackexchange.com/a/4048 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/