Wavelength at Maryport Parkrun

We had a lovely time at Maryport Parkrun - a very flat and fast course with lovely marshalls. Having posted about the wave sculpture in Whitehaven, I was interested to see the pattern of the waves against the pier. I counted 10 waves when I blew up the picture and measured a 200m distance from my map. That means wavelength is 20m. Not an easy thing to measure on the see and only approximate, compounded by the slight angle of incidence.