Biofouling on ships has well-documented undesirable consequences. It causes an increase in skin friction drag, leading to higher powering requirements (or reductions in steaming speed). Such effect has significant implications to the efficiency, economy and emissions of ship transportation. Furthermore, it also has negative outcome to the health of marine ecosystems, especially when one factors in the traditional use of biocides in antifouling ship coatings. For this research we intend to directly investigate the influence of bio-fouled surfaces on the performance of large operational ships.