As an offshore sailor, I find this photo extremely disturbing. One, because I'm not exactly sure of exactly what I'm looking at, and two, that what ever it is, it actually exists. It is obvious, that this is a multihull vessel, which have a history of 'tripping', from burying a hull. This would be the conditions in which that could happen. Unlike, monohulls, multihulls struggle to right themselves. McC