Port State Control inspects foreign-flagged vessels for compliance with international conventions. Selection is risk-based. In the Paris MoU, the Ship Risk Profile (SRP) is calculated from factors including vessel age, flag state performance, classification society, ship type and inspection history. High-risk vessels are inspected at every port call, low-risk vessels every 24-36 months.
The inspection process follows a clear pattern: first, the PSCO (Port State Control Officer) examines certificates and documents on the bridge. Then follows a walkthrough of the vessel, during which safety equipment, technical condition and accommodation are inspected. Finally, crew members are interviewed. The interview is not a formality -- it serves to verify the actual understanding of onboard processes.
If the initial inspection reveals indications of systematic weaknesses, the PSCO can order an expanded inspection or a more detailed inspection. This means considerably more time and a more thorough examination of all ISM, ISPS and MLC-relevant areas. In the worst case, the inspection ends with a detention, which holds the vessel in port until deficiencies are rectified.
Recurring problem areas include certificates, ISM evidence, life-saving and fire-fighting appliances and MLC documentation. Paris MoU annual reports have shown a consistent picture for years: the top five deficiency categories are fire safety, life-saving appliances, certificates and documentation, safety of navigation (navigational equipment) and MLC-related items.
In fire safety, common findings include defective fire extinguishers (expired test dates, missing seals), blocked escape routes, non-functioning fire detection systems and inadequate maintenance of the CO2 extinguishing system. For life-saving appliances, expired life jackets, defective lifeboat davits, unserviced life rafts and missing or outdated pyrotechnics are regularly found.
ISM-related deficiencies are often more subtle: missing follow-up on near-miss incidents, incomplete risk assessments for non-routine work, outdated procedures that do not match current onboard practice, or missing evidence of management reviews. These deficiencies signal to the PSCO that the Safety Management System is not being actively lived -- and this is the point at which an initial inspection escalates to an expanded inspection.
An effective approach involves preparation on three levels: documentation, equipment and crew. At the documentation level, the superintendent should work through a checklist before every port call in a PSC risk port: are all certificates valid? Do endorsements match? Is the Ballast Water Record Book up to date? Has the ISM audit been completed without open observations?
At the equipment level, this concerns a systematic walkthrough that the Chief Officer and Chief Engineer should conduct regularly -- not as a reaction to an upcoming inspection but as a fixed element of onboard organisation. The checklist should cover all typical PSC inspection points: fire extinguishers, life-saving appliances, navigation lights, valves and shut-offs, engine room ventilation, emergency exits.
At the crew level, it must be ensured that the crew can answer the basic questions PSCOs typically ask: where is the nearest fire extinguisher? How is the muster station reached? What is the alarm sequence for engine room fire? Which personal protective equipment is required for which tasks? A brief briefing before port arrival covering these points can make the difference between a smooth inspection and a deficiency.
Repeated minor deficiencies indicate weak management systems. In the Paris MoU system, a single minor deficiency has little impact on the risk profile. However, when similar minor deficiencies are found during several consecutive inspections -- such as repeatedly expired fire extinguishers or missing pyrotechnics -- the system interprets this as a sign of systemic failure. The risk profile rises, inspection frequency increases, and the probability of detention at the next inspection grows considerably.
For superintendents and fleet managers, this means: a minor deficiency found during an inspection must not only be rectified but its root cause must also be analysed. Why was the fire extinguisher not tested on time? Is it the PMS system? Missing responsibility assignment? Lack of oversight over test dates? The root cause analysis is more important than the mere deficiency correction, because it prevents the same deficiency from reappearing at the next inspection.
Worldwide, there are nine regional PSC regimes (Memoranda of Understanding), each with their own focus areas and assessment systems. The most important for international merchant shipping are the Paris MoU (Europe), Tokyo MoU (Asia-Pacific), US Coast Guard (separate, not MoU-based), Indian Ocean MoU and the Riyadh MoU (Arabian Gulf).
The Paris MoU operates with the New Inspection Regime (NIR), based on the Ship Risk Profile. It distinguishes between Periodic Inspections (regular, based on risk profile) and Additional Inspections (event-driven, such as after an incident or upon complaint). The US Coast Guard uses the Qualship 21 Programme, which rewards particularly high-performing vessels with reduced inspections.
Focus areas differ regionally: the Paris MoU places particular emphasis on MLC compliance. The US Coast Guard inspects very thoroughly in the area of ISPS and maritime security. The Tokyo MoU has intensified its focus on BWMS compliance in recent years. These differences mean that operators with global trading patterns must align their PSC preparation with the respective regional focus areas.
The Concentrated Inspection Campaigns (CIC) of the various MoUs are particularly relevant. Each year, the MoUs select a focus topic that is inspected with particular intensity during a three-month period. Past CIC topics have included STCW compliance, MARPOL Annex VI, work and rest hours and ballast water management. Operators should know the announced CIC topics in advance and prepare their vessels accordingly.
A realistic scenario: a general cargo vessel is inspected in the port of Hamburg. The initial inspection produces three minor deficiencies: an expired fire extinguisher in the engine room, a missing seal on a CO2 bottle valve and a defective emergency exit closure. Individually, these are routine findings. But the PSCO checks the inspection history and discovers that similar fire safety deficiencies were documented during the last inspection six months earlier in Rotterdam. This signals systemic failure.
The PSCO orders an expanded inspection. This additionally reveals ISM deficiencies: risk assessments for hot work are outdated, and the follow-up on a near-miss incident from the previous month is incomplete. The overall picture leads to a detention, holding the vessel in port for 48 hours until all deficiencies are rectified and confirmed by class. Costs for the operator: idle time, class surveyor, spare parts, reputational damage.
An effective PSC preparation framework covers three time horizons: first, ongoing onboard organisation -- regular walkthroughs, PMS maintenance, documentation standards. Second, port-specific preparation -- which MoU regime applies, which CIC is currently running, which deficiencies were found during the last visit? Third, crew preparation -- brief briefing on typical PSC questions and expectations of the crew.
The superintendent ashore must ensure they know the PSC history of each vessel and systematically follow up on open items. A vessel should never enter a PSC risk port without demonstrable evidence that deficiencies from the last inspection have been rectified.
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