Thanks Bruce, that's very helpful.
Here's an image of Amicus:
My partner looked her over this afternoon (on the slip until Friday; I will help the owner take her off) and she said. "It's very high"; she means the windage/freeboard. I thought the same; this is one of the disadvantages of semi-displacement hulls, I feel. I volunteer with Marine Rescue; we always seem to do rescues in poor weather and that almost always means moderate to strong winds. The IGs have decent keels, but there's not a lot of mass below the waterline to counteract that windage. That's just concepts, of course—what are they like in reality?
In my question, I was referring to a combination of wind and swell; this place is not called "windy point" for nothing!
The shipwright is retained by the owner; the boat is not on the market, but may be. The situation is that the owner is "thinking about selling" and I happen to live near the slips, so I see everything that goes up.
The deck has been replaced around the halfway point of the boat's life, I was told today.