smp’11 is the second in a series of international symposiums dedicated to hydrodynamics of all types of marine propulsors. smp’11 provides a forum to present state-of-the-art research and studies on existing marine propulsors as well as a platform for introduction of new types of propulsors. Special attention is given to dynamics of propulsors. Environmental issues are addressed by introducing topics on green propulsion and hydrodynamic aspects of renewable energy devices.