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      06-21-2012, 01:16 PM   #56
sleepless
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Drives: 11 E90 M3
Join Date: Jan 2008
Location: Redmond, WA

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The iPhone's GPS module is mostly useless for motorsports. It needs to be on the dash with a good line of sight to the GPS satellites to have a prayer of being even modestly useful. So, yeah, keeping it in the cubby will not work and yes, a good external GPS module is pretty much a requirement once you get past novice/intermediate driving speeds.