Arthur Piver (/ˈpaɪvər/; "Piver rhymes with diver"; 1910–1968) was a World War II pilot, an amateur sailor, author, printshop owner and legendary boatbuilder who lived in Mill Valley on San Francisco Bay and became "the father of the modern multihull." He also introduced new changes to the superfice of the boat, for better hydrodinamic, but he had no agreement.