To satisfy the inquiring minds who want to know, there are five starts, and in this order: Formula 18, Portsmouth (all the portsmouth boats, both high and low, started together and raced the same course), Formula 16, Hobie 16, Waves.
There are two courses, the outside course, which was sailed by F18, F16 and Portsmouth, and the shorter, inside course, which was sailed by the Hobie 16's and Waves.

There is a 3-minute start sequence, so it takes 15 minutes to get all the starts off. (Well, actually, from the first actual start to the last start is 12 minutes.)