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post #1 of Old 08-02-2012 Thread Starter
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Navigation Problem


I race in the same area which is influenced by tides and back eddies. Also different at springs and neaps. I want a method of recording the tidal speed when racing on a log - say every 1 minute preferably using a smart phone with compass and GPS - If not then a custom instrument.

I want take the data at the end of a sail and create an hourly tidal chart.

Any ideas? Any ideas of another forum which could help?

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