The boat is saltwater resistant :smgreen:, watertight, and really fast.
And there are very strict class rules to ensure fair racing without incurring additional cost.
http://www.stockmaritime.com/modellboote/3x1/regatten.php?lang=en_GB
Now there are sailing 180 boats, starting with 1.1.2012 with the first boats sailing in Hamburg, Germany.
Compared to an IOM the boat is nearly as fast at the tack (depending on the wind, sometimes faster in very light air), a little bit faster down winds on an up- and down, and much faster downwinds on a triangle.