This subject has just come up again as a result of a recent incident with the cruise vessel "Norwegian Dawn". Several references: 1) <http://www.yachtforums.com/forums/showthread.php?t=2970> I'm sure by now that most of you have heard about the ocean liner the Norwegian Dawn being hit by a rogue wave approximatly 70 ft high. This wave broke windows on decks nine and ten, with deck ten possibly being eight levels above the water line. 2) <http://boatdesign.net/forums/showthread.php?t=4365&page=1&pp=15>