"Exmouth Challenger" a big offshore multihull designed and built for Mark Gatehouse was followed by other big offshore mono and multihull projects up to 60 foot in length.A precursor to his later interest in and wide influence on One Design Classes was his innovative original and very successful NSM design for the Merlin Rocket class which included the entire rig and fittings layout so that sailor's buying the design could be told exactly how to set up the boats in different conditions for best performance.