From: Sunderland, UK
The book is £150 used!
Close to instability, but with the advantage of a slow roll.
If one wants good, real, info, one must pay for it.
0.72m is actually pretty darn good given the appropriate midship and prismatic, and GM has very little to do with roll rate. As I read the data, I would consider them stiff. If you want to know what the terms actually mean, how they are applied, and learn something about ship design in general, there are two good basic books, Skeene and Marchaj, that were written for introductory naval architecture students but are written in a way that a layperson can understand the concepts. I recommend them.
Not my field. There are some relevant results in complex systems theory, including an important recent paper. Early American CAs had a larger GM due to their unexpectedly low displacement and a really nasty roll.
"For a number to make sense in the game, someone has to calibrate it and program code. There are too many significant numbers that behave non-linearly to expect that. It's just a game. Enjoy it." firstname.lastname@example.org