I did another windsurf session yesterday and it shows the same.
Big dips and huge peaks.
Not related to swell, super flat behind the sand bars.
On the second watch I used the NMEA speed value and it is spot on compared to my own build units.
(custom code I wrote to see 1s, 2s and 10s average speed)
The software we use to analyze our session only likes coordinates, recording speed is not a thing we would use.
Looked at the code with NMEA and it does indeed use doubles.
Need to think about this, maybe it is something silly with the output from the Ublox in this watch.
I'll put the recorder on the other watch also to check if it is a specific watch issue or setting.
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