Port State Control (PSC) is the inspection of foreign vessels in national ports to verify that the condition of the vessel and its equipment, and the manning and operation of the vessel, comply with the requirements of applicable international conventions — including SOLAS, MARPOL, MLC 2006, STCW, and the ISM Code.
PSC authority is exercised by port state administrations through Port State Control Officers (PSCOs), who board vessels in port to conduct inspections. If a vessel is found to be deficient, the PSCO can issue deficiency notices requiring corrective action. If deficiencies are sufficiently serious, the vessel can be detained in port until the deficiencies are rectified.
PSC inspections are coordinated regionally through Memoranda of Understanding (MoUs) — the Paris MoU covers European and North Atlantic waters; the Tokyo MoU covers the Asia-Pacific region. A detention, or a pattern of deficiencies visible in the Paris or Tokyo MoU database, has direct commercial consequences: charter parties may contain clauses allowing charterers to reject a vessel with a recent detention, and hull and machinery insurers take account of PSC performance in underwriting assessments.

PSCOs inspect both the physical condition of the vessel and the documentation and records that demonstrate compliance with international conventions. Maintenance records — and the CMMS data that underlies them — are a regular focus of PSC inspection, particularly under the ISM Code audit component of expanded PSC inspections.
The documentation and record-keeping areas most frequently associated with PSC deficiencies include:
PSC readiness depends on maintenance records that accurately reflect actual maintenance practice, which in turn requires a CMMS populated with correct, complete, and up-to-date vessel data. A vessel whose CMMS contains incomplete equipment records, incorrect maintenance intervals, or missing maintenance history cannot generate the maintenance documentation that PSCOs require.
Sharecat Data Services helps maritime operators build and maintain the vessel data quality that supports PSC-ready operations — constructing or verifying vessel equipment registers, verifying maintenance intervals against maker requirements and class society guidance, enriching equipment records with verified manufacturer names, model numbers, and part numbers, and structuring maintenance task libraries to reflect actual maintenance requirements for each vessel.
For operators preparing for Port State Control inspections or addressing deficiencies identified in previous inspections, Sharecat Data Services provides targeted data assessment and remediation services — identifying specific gaps and errors in CMMS data and delivering corrected data in the exact format required for direct loading into AMOS, ShipNet, STAR Suite, or any other maritime CMMS platform. All work is supported by a proprietary reference database of approximately one million verified manufacturer names, part numbers, and model numbers.
