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Old 28th October 2013, 01:03 PM
PsYcHe PsYcHe is offline
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Join Date: Jan 2009
Location: Blantyre, Scotland
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That'll only really get it wrong when the nav is using 'dead reckoning' and has no satellites (tunnels, been off for a bit, etc.). The rest of the time it'll use the GPS signal.
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