sentences:  With three blade like hulls these ships would have cut through the water with a minimum of hydrodynamic noise.Radiated mechanical noise would also be minimised by using propulsors powered by a diesel-electric power plant; with the diesels being placed in the superstructure to mechanically isolate them from the water.This project got as far as the construction of the research ship RV Triton to test the principle of a large scale trimaran design.