Officials said the boat was trying to set a record time for the route from Monte Carlo to Venice.
In Pictures: Stunning sea views win photography awards
In Pictures: Village puts on a show with scarecrow festival
In Pictures: Colossal cabbages and massive marrows in battle for giant veg prize
In Pictures: Harry and host of stars on call to help charity fundraising day
In Pictures: Kate launches final play garden of the season
In Pictures: Black pudding hurlers go for glory at World Championships
In Pictures: Highland highlights at the Braemar Gathering