The Onboard Medical Centre: Between MLC and Voluntary Standards
The MLC minimum operates alongside applicable national medical duties. US sections 3507 and 3509 also incorporate ACEP within their respective scopes; distinguish these duties from CLIA commitments and voluntarily adopted standards.
Operational Explanation
The MLC minimum must be considered alongside other applicable duties and adopted standards. CLIA oceangoing lines carrying at least 100 persons on itineraries to international waters commit to meeting or exceeding the October 2023 ACEP guidelines. Distinguish this membership commitment from law and SMS requirements: document source, version and applicability.
Regulatory Reference
MLC A4.1.4(b): a qualified doctor is required on ships carrying at least 100 persons ordinarily engaged on international voyages exceeding three days; national law also determines other cases. Regulation 4.1 protects seafarers’ medical care. This is not the only possible source of medical duties: check flag, coastal-State and national law. ILO: MLC A4.1.
For ships without a doctor, A4.1.4(c) requires at least one seafarer responsible for medical care or competent in first aid under the applicable arrangements, with STCW training. A4.1.4(d) requires the authority to ensure free, round-the-clock medical advice by radio or satellite: this does not establish a universal two-nurse onboard complement.
Within CVSSA scope, §3507(d)(3)(C) also requires personnel to meet ACEP guidelines for treatment and care of sexual-assault victims. Also check the separate section 3509 duty below.
46 USC §3509 requires ships subject to §3507, subject to relevant exemptions, to have a physician continuously present and available for emergencies, comply with ACEP Health Care Guidelines and include medical-facility and emergency instructions in the initial passenger briefing. ACEP therefore cannot always be described as voluntary. 46 USC 3509. Also check the cumulative Pub. L. 117–263 §11510 exemption for certain US inland passenger vessels, reproduced in the note to §3508. §3508: statutory notes.
Scope of Application
Section 3507(k) cumulatively requires authorization for at least 250 passengers, overnight accommodation for at least 250, and a voyage embarking or disembarking passengers in the US; check federal/state exclusions. Section 3507(d) requires sexual-assault response resources and personnel, not general medical-centre certification. 46 USC 3507.
Procedure / How to Complete It
- Check MLC and any national/flag medical requirements.
- Check all three CVSSA criteria, §3507(d), §3509 and relevant exemptions.
- For in-scope ships verify medications, forensic examination equipment/materials and credentialed medical staff available at all times with required qualifications and training.
- Check CLIA membership commitments, applicable ACEP version and implementation in procedures; distinguish these sources from legal duties.
Practical Example
Example: the Company first verifies applicable MLC compliance. If the vessel meets all cumulative conditions in § 3507(k)(1), it also checks the specific sexual-assault response resources and competencies required by § 3507(d). Also check §3509 and any exemptions; document additional voluntary or company standards separately.
What Typically Goes Wrong
Common Mistakes Mistake Library
| Mistake | Consequence | How to avoid it |
|---|---|---|
| Presenting ACEP as a general legal requirement | Confusion between binding requirements and a voluntary standard | First check statutory ACEP incorporation under §§3507 and 3509 and exemptions; distinguish additional contractual and SMS commitments |
| Applying CVSSA on the basis of a US call alone | Incorrect legal scope and irrelevant documentation | Verify all three cumulative conditions in § 3507(k)(1) and, when met, the specific § 3507(d) requirements without inventing a general medical-centre certification |
What the PSCO Checks
Operational Tips
- Separate the MLC minimum, §§3507 and 3509 duties and exemptions, CLIA commitments and voluntary standards.
- If ACEP is adopted in a company procedure, check it as an SMS requirement and identify its source correctly.
- Coordinate medical procedures with outbreak response and sexual-assault response under the applicable instruments.
Preparation checklist
Educational checklist. This summary supports learning and preparation only. It does not replace the vessel’s approved procedures, manuals, statutory documents, company SMS, or applicable official requirements. Completing it demonstrates neither compliance nor readiness for an inspection: it shows that a list has been read, not that the ship is in order. Always verify the current documents carried on board.
- Doctor: 100-person threshold and ordinary employment on international voyages over three days checked, together with additional national cases
- Nursing complement and medical coverage checked against applicable law, CLIA commitments and procedures
- Clinical operating standards aligned with the reference ACEP guidelines
- Sections 3507 and 3509 applicability, exemptions and medical evidence checked
- Equipment for treating routine conditions and stabilising serious conditions available
- Coordination between the medical centre and gastrointestinal outbreak management procedures defined
FAQ
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Last substantive revision of this page: 16 September 2026 · page fingerprint cebc659b6ea3