ORACLE Team USA skipper Jimmy Spithill explains the progression from the AC45F raced in the Louis Vuitton America's Cup World Series to the America's Cup Class boats.
The differences might seem minute to the untrained eye, but make a huge difference on the racecourse.
We will see the teams launching their new AC class boats early in 2017.
Land Rover BAR launched their official race boat - R1 aka Rita - last week.
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13 February 2017 9:44 GMT