A mix of classic Offshore Racing and Grand Prix circuits will combine to make up the 2015 UIM ClassOne World Powerboat Championship which has been agreed between representatives of the U.I.M., teams, drivers and H2O Racing, promoter of the UIM ClassOne World Powerboat Championship, with the following press release issued by the U.I.M. UIM CLASS 1 AND V1 RACING CALENDAR AGREED FOR 2015 At a Class1/V1 Stakeholders’ meeting held in Rome, representatives of the International Powe