So I was out riding today and decided that the pp on my boat was reading too high (23 feels like 25 or 26) but I realt can't tell outside of a guess. I want to calibrate it to read correctly but don't have a GPS or anything fancy like that to set up the speed correctly. Does anyone have a suggestion on how to do this without a GPS to tell you you current mph? If there isn't an easy way to do it without using the GPS no worries, I just wanted to see if anyone has any insight to drop on my dumb self.
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