an angle of about sixty or seventy degrees starts to put a vessel’s lee gunwales underwater. That means there’s greenwater on deck, and the righting moment has that much more weight to overcome. The boat may eventually recover, but she’s spending more and more time underwater. The deck is subject to the full fury of the waves and a hatch might come loose, a bulkhead might fail, a door might burst open because someone forgot to dog it down. Now she’s not just sailing, she’s sinking.
