I do not agree that you are trying to maintain constant apparent wind. You are trying to go as fast as possible and as deep as possible. As you accelerate the first thing that happens is that the apparent wind moves forward, thus you need to (maybe) sheet
IN. If the hull rises (it may not) you then need to eaither let some sheet off, or bear off. IF you bear off, the apparent wind moves aft, thus you may need to sheet out, but as you bear off, you may continue to accelerate and so you may NOT need to sheet out.
What we are trying to do is stay at max speed and also drive down on any gusts which allow you to sail DEEPER and FASTER.
[quote] Also be very aware that buy easing the sheet or traveler in conjunction with bearing off in a gust, you open up the sail and present a big flat area of sail dirrectly in front of the wind 8.5 meters up in the air. This is the perfect recipe for stuffing the bows in every big gust.
is not how I see it. When I've been sailing 2 up (Hurricane 5.9) and the bows dive in, the quickest way to get the bows out was to easy a few inches of mainsheet - this opens up the top of the mainsail and dumps a little bit of power just where the most torque on the bows is coming from. This is what I think Bundy was doing in the onboard video from the medal race at the ollies, ease the mainsheet to pop the bows out of each wave they went into.