Port state control (PSC) inspection is the safeguard of maritime safety and the marine environment. Due to the limited inspection resources and high inspection costs, the port states could only select substandard ships with higher risk for inspection. Therefore, efficient and accurate identification of substandard ships is of vital importance. This paper reviews ship selection methods currently implemented in practice and proposed in the existing literature and then discusses their pros and cons. Based on the review, a combined model that considers both ship deficiency and detention is developed and validated in this study. Reasonable and comprehensive comparisons between the proposed combined model and the ship selection method currently used at the Hong Kong port are conducted. The results of the comparison provide managerial insights and suggestions to the Memorandum of Understandings (MoUs). This study serves as the pioneer to review the ship selection methods implemented at the port states and proposed in current literature for PSC inspection. It is also the first study that combines the number of ship deficiency and detention in a unified model for ship risk calculation. This study is valuable for improving ship selection efficiency in MoUs and thus for safeguarding maritime transportation.
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