Are the Maryhill and Wall sensors now accurate?

[biffmalibu]

Marhill used to read about 5mph high. Has this been fixed?
Thank you for the information.

[isobars]

Accurate, schmaccurate.
It's all relative ... relative to sensor calibration, placement, topography, wind direction, and more.

• Just because a Hatchery 20 feels like an Arlington 25 (28?) doesn't imply either is "accurate". Someone posted here a couple of years ago, for example, that ordinary sized WSers had to use 4.0-4.5 sails to plane in winds averaging a measured 40-45 mph winds at their east coast venue.

Bull. That's a sensor location issue.

• Windspeed, and often direction, in this tortuous terrain varies over mere seconds and yards. "Average" and "accuracy" are mathematical constructs; it's what we feel that matters.

• Just when we get dialed into a site, its sensor, and how to convert data into sail size, something changes. Numbers that used to be perfect on a 4.0 one season or wind direction may match a 3.5 or 4.5 next season or wind direction.

• Then there's the equipment. I changed models (not brands) of sail last year, and had to recalibrate my sail size selection algorithm by more than half a sq meter even in the smaller sizes.

• What really needs "calibration" is US. We learn from experience what board, fin, sail, downhaul and outhaul tension, and lunch work best at a given site with given sensor and eyeball readings, then stick with that calibration until it bites us in the ass too many times. At that point we recalibrate and hope it works for a while.

[cgoudie1]

+1 for Mike's sage words. But this year the MH meter reading 27 is just
the equiv of 21 at the Hatchery for a 190 lb rider on an 80 ltr board.
That'd be 5.2/4.7 for me ;*)

-Craig