GlossaryEN1 min readUpdated: Jun 26, 2026
PSC Detention
A PSC detention is the formal immobilization of a vessel by port state control (PSC) authorities when inspectors identify deficiencies serious enough to pose an immediate threat to safety, the marine environment, or crew welfare.
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Source: https://www.imo.org/en/OurWork/Safety/Pages/Port-State-Control.aspx
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Logistics Concept
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Definition & Explanation
A PSC detention is the formal immobilization of a vessel by port state control (PSC) authorities when inspectors identify deficiencies serious enough to pose an immediate threat to safety, the marine environment, or crew welfare. The ship is prohibited from sailing until all noted deficiencies are rectified and the authorities issue a release certificate. Common triggers include expired or missing safety certificates, inoperable lifesaving appliances, inadequate crew documentation, and evidence of oil pollution. Detention periods vary widely – from a few days to several weeks – depending on the complexity of repairs and parts availability. Repeated detentions can result in a vessel or operator being blacklisted under regional PSC regimes such as the Paris MOU, with significant reputational and commercial consequences.
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