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post #1 of Old 08-12-2019 Thread Starter
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GPS determined speed

I happened to notice that my old Ray C80 and a newer, but old B&G Zeus T7 were not reporting identical SOG yesterday. They were never more than .1 knots different... but what do I attribute this to?

old technology in the C 80?
rounding algorithm?

I have several other GPS including smart phone which I did not check. The difference is small and of no consequence...

Just curious... any thoughts?

pay attention... someone's life depends on it
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