ANTHONY F. MOLLAND is Emeritus Professor of Ship Design at the University of Southampton. Professor Molland has extensively researched and published papers on ship design and ship hydrodynamics including ship rudders and control surfaces, propellers and ship resistance components. He also acts as a consultant to industry in these subject areas and has gained international recognition through presentations at conferences and membership of committees of the International Towing Tank Conference (ITTC). Professor Molland is the co-author of Ship Resistance and Propulsion (2017) and editor of the Maritime Engineering Reference Book (2008).STEPHEN R. TURNOCK is Professor of Maritime Fluid Dynamics at the University of Southampton. He teaches Masters modules in Ship Resistance and Propulsion and Marine Renewables. His research encompasses both experimental, theoretical and simulation work in the areas of decarbonisation of shipping through improved energy efficiency of shipping, future fuels and maritime autonomy. He works extensively in marine renewables devices, underwater systems, propulsors and control surfaces. The Performance Sports Engineering Lab he led at Southampton was awarded the Queen's Anniversary award for Higher Education in 2012. He acts as a consultant to industry and was on committees of the ITTC and International Ship and Offshore Structures Congress (ISSC). Professor Turnock is the co-author of Ship Resistance and Propulsion (2017).