Thanks for the input, guys
I never sail DDW or by-the-lee if I can help it, and never without a preventer, but I'm just trying to get this all strasorted out in my thick skull (not thick enough to survive being clobbered by the boom, though). But then again, there are situations where you are constrained by navigation and have to go DDW or close to DDW, and maybe not ready/willing to fire up the iron main. I think the magic word, the one that makes it all clear, is "backwinded" Now, why didn't I think of that?! It's obviously not the geometry of the BOAT relative to the apparant wind, but of the BOOM! "Great minds think alike", and you've confirmed what I was muddling over..