The tow sailors were not seriously injured but it is reported that the rest of the crew had to cling on to the netting of the trimaran before help arrived.
Swiss team Alinghi are getting ready to race BMW Oracle for the next America's Cup, and French expert Alain Gautier was training Alinghi, who have little experience with multihulls.
Ed Baird from the Alinghi team explained what happened: "As we were bearing away, always the highest risk situation on a multihull, both the leeward and the central hull dug into the water and the rudders came out. From then it was out of our hands and we capsized forwards. As the mast hit the water, it broke, followed by the rear beam."
