Twin bilge keels?
Anyway, to answer you questions on "TWIN KEEL" boats. Yes, they are safe for ocean passages. As far as roll comfort that Jeff mentions, twin keels produce less roll than a monokeel, to me that would indicate more comfort., and the additional weight makes a less bouncy , albeit slower, ride. Check out this web site for more opinions on twin keels...www.drinian.homestead.com/files/twins.htm