> I found this paper from Oregon State University on a roll perior test & > using it to estimate stability in small fishing vessels. It's quite > informative & should answer all your questions & more. It's important to > remember that roll period is not just about how comfortable your boat is > but > is also an indication of your vessels stability. > > http://ir.library.oregonstate.edu/dspace/bitstream/1957/5573/1/SR+no.+779_ocr.pdf > Carl MartinScout 30 I decided to do the calculations contained in this OSU piece but was a bit baffled by it. Said you need 3 numbers, length, beam and freeboard but the formula required only roll period and beam. Am I missing something? I have considerably more freeboard and top hamper on my sundeck boat than a fisherman but according to the formula, it neither aids or affects me negatively. Any ideas? Regards, Larry and Teri M/V Cigano, 47' Prairie Sundeck Cruiser Lying: Covington, LA N 30 26.7 W 90 07.1