I know! It took most of this summer to get my tide clock to predict accurately, using NOAA harmonic constituents data crammed into an Arduino, a GPS module, an

I know! It took most of this summer to get my tide clock to predict accurately, using NOAA harmonic constituents data crammed into an Arduino, a GPS module, and published formulas. Take a look: https://digitalhorology.etsy.com/listing/4345582508 https://digitalhorology.etsy.com/listing/4345582508