Weird that the two-track heasdsail change is now some tale of the old days. We did that a lot and it seemed totally normal. If you get it right it is hardly any more delay in sailing than a tack.
And there's the rub.
I've been on many MANY boats which were pretty good, but would definitely benefit from crew practice/coaching. Breaking down the maneuvers into repeatable steps which can be fine-tuned is the key coupled with repetition until you no longer have to say anything.
Every single time I've mentioned this to skippers I have gotten push-back like you wouldn't believe. "We know how to race!!"
I always wondered why they went through all those contortions to estimate displacement instead of simply weighing the boats. All that game playing crap with bow down trim and BMAX bumps could have been eliminated. Travel lifts have scales built in that, while seldom accurate, could easily be calibrated to a standard weight.
The other "wonder" I had was why it took them so long to respond to the rule induced stern contortions. Obviously the after girth calcs were flawed - why didn't they simply tweak the formulas to stop the advantage of distorting the sterns? We're talking years, even a decade before the bustled stinger sterns lost their advantage in measurement.
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