http://www.herreshoff.org/frames/mmphotojboat6big.htm

This is the America's Cup winner of 1930, an N.G. Herreshoff design and the
last AmCup racer with a centerboard. The wind looks fairly light (although
remember that this boat is 120+' LOA, which distorts the scale) and the boat
is heeling 12 ~ 15 degrees... but look at the wake. Obviously the boat is
moving well. But is it "powered up"?

BTW the rest of the series os pretty nice too.

I suspect that Navvie (and a lot of others) consistently overestimate heel
angle. When you're on the boat, the constant motion makes it seem like the
boat is heeling a lot more than it really is. I've had people tell me we
were heeling 45 degrees when in fact it was only 20 on the fun-meter. When
looking at pics, the angle of the leach always exaggerates the heel too.

Fresh Breezes- Doug King