The boat "Castoldi Jet" was the first class one offshore powerboat to use a water jet propulsion. Designed by Don Shead, ( easy to spot as he's only ever designed one hull!!!!!)
Iit was 37ft long and built by Enfield Marine in 1972,. It won the 1974 Santa Margherita Offshore Race at an average speed of 66.9mph. It was powered by twin 600hp Aeromarine engines driving a single Castoldi hydrojet type 06!!!