The Three Peaks Yacht Race is held each year in June in the United Kingdom since 1977. It is based on an idea of Bill Tilman, who had advocated a Three Peaks Challenge route without using motorised transport. His doctor, Rob Haworth, with colleague Merfyn Jones developed the idea into a race.
The yachts have powerful turbines to propel them through the water.
We are told the route is "without using motorised transport" - so, all wind power, no turbines spinning behind the boat.
( z1 have :ARG0 ( z2 yacht ) :ARG1 ( z3 turbine :ARG1-of ( z4 powerful ) :ARG0-of ( z5 propel :ARG1 z2 :path ( z6 water ) ) ) )