At a recent race the battery faded on my Dual XGPS150 and the iPhone reverted to using the built in GPS Luckily for me it kept recording all laps and the data is still usable. But.... the accuracy on my phone isn't as good as the Dual and a few laps have an extra split from where the Kart track passes the split.
For example, I have:
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Lap Time: 00:51.63
Split 1: 00:09.08
Split 2: 00:20.82 (00:11.74)
Split 3: 00:36.61 (00:15.79)
Split 4: 00:51.63 (00:15.02)
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Lap Time: 00:51.63
Split 1: 00:20.82
Split 2: 00:36.61 (00:15.79)
Split 3: 00:51.63 (00:15.02)
Thanks,
Doug