Ok thank you but we need the limit of positive stability. This is the stability index.
I understand one is used to determine the other with some variables.
They are quoting
ISAF offshore as the route document but when you drill down to the bottom you come to a ISO 12217-2 requirement and there is no calculation?
There used to be one on
US Sailing but now the link is dead?
There is a very good article on why the whole calculation is flawed from a US Navy Prof at anapolis here.
http://www.usna.edu/Users/naome/phmiller/phmSAS03.ppsSo with the variables and lack of the calculation we are scratching our head.
We are to take into account draft of hull not the whole draft and the beam and free board.
This was how I came to my number but I was hoping the class would have something with all the variables filed in so we can quote the class site. Has
J/Boats ever rolled a boat to check the numbers? Yachting monthly did this recently and it was surprising to see a similar era yacht in size and shape needed a small nudge from the crane to right itself from inverted?
Does any one still have the proper calculation? I will follow this up with PIYA NW who are imposing this restriction. Just as a note they have changed the angle by over 10deg in less then three years so this tells me they don't know what is safe either.
