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Structural codes rely on generalised target reliability indices, which are mainly derived for buildings and bridges. It is unclear, however, whether these indices are applicable to the specific risk-profile of marine structures, such as quay walls, jetties, and flexible dolphins. In this study, target reliability indices for marine structures were derived from various risk acceptance criteria, such as economic optimisation, individual risk (IR), societal risk (SR), the life quality index (LQI) and the social and environmental repercussion index (SERI). This article uses a method to determine reliability targets distinguishing time-dependent and time-independent variables, because some important stochastic design variables in the design of marine structures, such as soil and material properties, are largely time-independent, whereas other design variables are time-dependent. Failure consequences can take many different forms and can differ considerably per limit-state. As a result, reliability targets differ per limit-state. The assessment framework of ISO 2394, taking into account social, economic and environmental impact, has proven to be a solid basis for reliability differentiation, and consequently the derived reliability targets are directly linked to this standard. The method of approach considered in this paper can also be used for evaluating target reliability indices of other civil and geotechnical structures.