Failures in marine structures are often caused by the accumulation of small cyclic loads over time. This new edition provides engineers with the knowledge required to assess fatigue risk through long-term loading analysis and cyclic stress calculation. Real-world examples highlight the critical importance of fatigue design, including a detailed account of the Alexander L. Kielland platform collapse. Laboratory testing methods are explained, along with procedures for deriving fatigue capacity and design S-N curves. The book presents numerical techniques for generalising test data, including finite element methods for extracting hot spot stresses. New chapters address fatigue in large-diameter flanged connections and early-age cycling in grouted joints, reflecting developments in offshore wind turbine structures. Updated standards and expanded sections on bolted connections and fracture mechanics support safe and efficient design. An essential resource equipping engineers with the tools to prevent fatigue failures and improve structural integrity in demanding marine environments.