This chapter explores positive psychology as an approach to enhancing well-being at sea. To date, the application of positive psychology concepts, interventions and training to the maritime context has been explored only to a limited degree. This chapter commences with a discussion of the seafaring context. The ship as an isolated and confined environment, a safety-critical organization, and as a fusion of maritime-specific stressors is considered. Next, the field of positive psychology—its conception and previous applications—is discussed. Along these lines, the field of positive organizational psychology and the newly emerging field of positive organizational behavior are explored, with a particular focus on psychological capital, including resilience, as a core conduct of positive organizational behavior. Ensuing these sections is a discussion of the contexts in which positive psychology has previously been applied to promote well-being at sea. To conclude, rationale for future research and key research questions are presented.