Hydrodynamic Analysis in Redesigning a Monohull Passenger Ship into a Catamaran Ivory Giyan Mitari, Wiwin Sulistyawati and Purwo Joko Suranto E3S Web Conf., 328 (2021) 07007 Published online: 06 December 2021 DOI: 10.1051/e3sconf/202132807007