This volume contains 31 papers by international experts in hydrodynamics, based on talks at a symposium held in honour of Professor Enok Palm on his 70th birthday. The volume begins with two review papers on the history of hydrodynamic research at the University of Oslo and on engineering applications of hydrodynamics in the offshore industry. It continues with recent developments in marine hydrodynamics, nonlinear wave-diffraction, wave drift damping, nonlinear wave theory, breaking of waves, effect of surface tension on wave motion, nonlinear stability, thermal convection, turbulence, stratified flows, particle drift and dispersion, self-organization, damping of waves in kelp forests and ocean modelling. This edited volume is intended for researchers, engineers and students interested in hydrodynamics and its many different applications.