How can you find your max useful load ?
I have a 1976 18 foot cortez. It was made in Arizona as a 16 foot open cabin. They only made around a hundred of them. There was a couple different people that stretched it to 18 feet and enclosed the cabin. I am an airplane pilot and gross weight is one of the most important concerns. I do not know a lot about sailing or my boat. I do not want to over load it, but I would also like to take some of my friends out. How can I find my useful load?