Ok, a dumb question from a rusty once and future sailor. I was researching boats and this issue may have arisen from the Kraken yachts web site. Not entirely sure because I went down a real rabbit hole. Anyway, X manufacturer stated that its vessel can recover from 130-degree knockdown. That sounds pretty good. But does that mean/imply that such a craft would allegedly self recover from turning turtle? Without luck/wave action? Can see why a builder might not want to address a capsize directly but this inquiring mind wants to know!
To give a simplistic answer - you are likely not going to find the answer to this from manufacturers published information.
Ok, less simplistic answer below, but mind you - it's still a simplistic answer...
One needs to know the stability of the boat in the inverted position. What the data means stating "the vessel can recover from 130-degree knock-down" is that at 130 degrees the center of flotation is still higher than the center of gravity.
You have two concepts, the center of gravity and the center of flotation - the boat will remain in a position where the center of flotation is higher than the center of gravity unless forces act on the boat to move the boat into a position where the center of gravity is above the center of flotation and then the boat will move into a position where the center of flotation is higher than the center of gravity. In your case, once you move past 130 degrees the boat is going to go the "wrong way"...
The problem, is these two theoretical concepts are dynamic, not static. (They are also 3 dimensional...gets really complicated) Simply put, this means that these two points move with respect to each other as the boat moves. At 130 degrees (in your case), these two points are very close together, but they are still with the center of flotation higher than the center of gravity, so the boat will naturally right itself (keel down and mast up). Once the boat gets to 131 degrees, the center of flotation drops below the center of gravity and the boat will flip to where the mast is down and the keel is up - center of flotation higher than center of gravity.
Your question (and it is certainly not a dumb question) is - what does that 130 degrees mean in terms of self-recovery. The simple answer: nothing. The answer to that question is a function of how "stable" the boat is in that position once past 130 degrees. Think of the catamaran example given above. There you can easily see that the configuration of a boat with two widely placed hulls will be very stable both in a position of mast up and with mast down. As you can see, there is a lot of stability for a catamaran to stay upside down, once it gets there. What that means is the shape of the boat has an inherent "stability" to remain in the inverted position.
Now if you think about a mono-hull - you have that heavy keel, the mast, the hull shape all working when upright to keep your boat upright. Now, you go past that 130 degrees - what happens? To know the answer to this question, you need to know how stable or unstable the boat is in this "new" position. In a number of so called "blue water" sailboats, the curve of stability in the inverted position is very small. I've never actually seen published numbers for this - but I used to have a blue water sailboat where that 130 degree number you've used in the upright position - was probably something like 10 or 20 degrees in the inverted position. That boat actually went through a hurricane once and was completely rolled 3 times. But it never stopped in the roll - it got knocked down beyond the point of stability, and just continued to roll until back upright again. Of course all hatches and the companionway were closed so down flooding was minimal.
Hope this helps a bit....
dj