Its hard to believe that my big tubby boat could tip over easily. The only two variables in determining capsize values are displacement and beam. I would think that keel size, shape, and ballast would be factors also.
A tubby boat is not neccessarily any more or any less prone to capsize. US Sailing has an Angle of Vanishing Stability caculator on their website, check it out: http://www.sailingusa.info/cal__avs.htm
I read that if a wave approaches the size of your beam, then you may be toppled. But I think that frequency and shape of waves matter too. In canoe hulls they talk about primary and secondary stability. My Bayfield is 29' with 10'2" beam; most likely regarded as more primary stability, according to the calculators. Other boats in her class, like the Cape Dory and Southern Cross, have less beam and rate as more stable in the capsize value chart.
"Hi All,
french built 2010 43 has been very dry down below but now a slow leak has occurred which is showing at the limber holes under the floor board in forward cabin. Bilge pump goes every 3hrs for 20secs. Not sure if it’s fresh/rain water or…"