jfm
Well-known member
+1 to all that.Not so odd, when you think about it.
This is a case where size does not matter, or not as much as you'd expect, because the righting moment which a static fin can create depends mostly on its leverage, rather than its size.
And the distance of a swim platform from the hull CoG (or more appropriately, its CoB, though the difference doesn't really matter in this context) is close to nothing.
Just think of paravanes: they are deployed using very long arms, in order to exploit as much leverage as possible. That's what make them reasonably effective, in spite of their smallish size.
If by rocker stoppers you mean those sombrero shaped plastic thingies that can be deployed from the hull sided, with a line along which you can attach a few of them and a weight at the line end, I have no first hand experience, but TBH I think they are bound to be worth what they cost (i.e. very little), for the very same reason.