Safety concerns in shipping in and around the Netherlands' harbors and ports range from the risks and environmental impacts of shipping disasters to the economic effects of more common accidents. Safety is also an important precondition for further developing Rotterdam's mainport function. The Netherlands Ministry of Transport, Public Works and Water Management asked RAND Europe to develop an analytical framework to identify promising sea shipping safety policies. The study, Policy for Sea Shipping Safety (POLSSS) included an assessment of the costs and benefits of a range of policy options for maintaining or improving safety in the North Sea, a survey of the perceptions of stakeholders about the safety situation in the North Sea, and a survey of the perceptions of stakeholders about the cost-effectiveness of some of the policy options. This report provides an overview of the project and its results. More detailed information is contained in three supporting volumes, which are available from RAND Europe.