The short version
- A vessel medical compliance audit is a formal inspection of a ship’s medical stores, equipment and records against flag-state, IMO and MLC 2006 requirements.
- Five areas are examined: medicine chest and inventory, controlled drugs, medical records, hazardous cargo kits, and equipment and facilities.
- Chest inspection is expected at intervals not exceeding 12 months, and the record must be available to the inspector.
- For US-linked vessels the controlled drugs area is not one rule but two regimes, MLC and 21 CFR 1301.25.
- Most failures are a missing document, not a missing drug.
A vessel can carry every required medicine and still be detained. Port state control does not weigh the chest, it reads the record that proves the chest was checked.
This page walks the five areas an audit examines, names the document each one turns on, and marks where US rules add a second layer that most published guidance leaves out. For an independent physician review, see Consulting.
What a vessel medical compliance audit is
DefinitionA vessel medical compliance audit is a formal inspection of a ship’s medical stores, equipment and records to confirm they meet flag-state, IMO and MLC 2006 requirements. It exists to prevent a port state control detention and to confirm that a sick or injured crew member can actually be treated aboard.
MLC 2006 Standard A4.1(4)(a) requires the chest, the medical equipment and a medical guide, inspected at regular intervals[1]. The flag state sets the specifics beneath that floor, which is why two vessels in one fleet can face different checklists.
The five areas an audit examines
Each row names what the inspector asks for and the single document that settles the question.
| Audit area | What is examined | The document that proves it | Authority |
|---|---|---|---|
| Medicine chest and inventory | Expiry dates, quantities and drug types against your flag state’s medical scale | The dated inspection record, signed | MLC 2006 A4.1 · WHO IMGS |
| Controlled drugs | Secure storage, access control and exact logging of every movement | Copy 2 of the record of sale, held aboard | 21 CFR 1301.25 · part 1304 |
| Medical records and logs | Treatment logs, sign-offs and case reporting | A complete, legible treatment log | MLC 2006 A4.1 · flag notices |
| Hazardous cargo kits | MFAG kit present and correct if you carry dangerous goods | MFAG kit inventory matched to cargo | IMO IMDG Code |
| Equipment and facilities | Hospital or treatment space, oxygen, stretcher, comms for medical advice | Equipment list plus a working advice route | MLC 2006 A4.1(4) |
Area 1: medicine chest and inventory
Expiry dates, quantities and drug types are checked against the medical scale your flag state prescribes. Contents commonly map to the WHO International Medical Guide for Ships and its Quantification Addendum[5].
The failure here is rarely an empty shelf. It is one item that aged out between annual checks, or a chest built to a generic kit list rather than the flag’s own notice. Our flag-state comparison sets out five frameworks side by side.
Area 2: controlled drugs, where US rules go further
Every audit checklist lists secure storage, access control and accurate logging. For a US-linked vessel that is only the first regime.
The layer most guidance omitsCarrying controlled substances aboard a vessel in international trade or between US ports engages 21 CFR 1301.25[3]. That brings a DEA-registered medical officer or the master requisition route, a triplicate record of sale, two annual reports on different clocks, and disposal under 21 CFR part 1317[6]. None of it is satisfied by a tidy locker.
The single document an inspector asks for first is copy 2 of the record of sale, which paragraph (d) requires to be retained aboard the vessel[3]. Read the recordkeeping guide and the route comparison, or see the Controlled Substances service.
Area 3: medical records and logs
Treatment logs, sign-offs and case reporting. The test is whether an independent reader can follow what happened to a patient, in order, without asking the person who wrote it.
Legibility and completeness matter more than volume. A short log that reconciles with the chest inventory is stronger than a long one that does not.
Area 4: hazardous cargo kits
If you carry dangerous goods under the IMO IMDG Code, specialised first aid and Medical First Aid Guide provision is examined alongside the ordinary chest[7]. The kit must match the cargo actually carried, not the cargo the vessel usually carries.
Area 5: equipment and facilities
Treatment space, oxygen, stretcher access and a working route to medical advice. MLC 2006 A4.1(4)(d) gives every vessel a right to free medical advice by radio or satellite at any hour[1], and an inspector may ask the crew to demonstrate they know how to use it.
A4.1(4)(b) additionally requires a qualified doctor aboard where 100 or more persons sail an international voyage of more than three days[1].
When to bring in an outside reviewer
Three triggers, in the order they usually appear.
- An inspection is scheduled and nobody has read the records end to end. The cheapest possible time to find a gap.
- Ownership, flag or route has changed. A change of owner or operator can invalidate the controlled substances registration structure entirely[3].
- The person who stocks the chest also signs it off. Self-certification is permitted in many cases and is still the weakest evidence you can present.
Common questions
What is a vessel medical compliance audit?
A formal inspection of a ship’s medical stores, equipment and records against flag-state, IMO and MLC 2006 requirements. It covers five areas: medicine chest and inventory, controlled drugs, medical records, hazardous cargo kits, and equipment and facilities. The purpose is to prevent a port state control detention and to confirm the crew can actually be treated. See Consulting.
Who can carry out the audit?
Flag states generally expect a designated person aboard or a qualified party ashore to verify and document the chest[1]. An independent physician review is stronger than a self-check because it separates the person who stocks the chest from the person who signs it off. Ask us to scope a review.
How often should a vessel be audited?
MLC 2006 Guideline B4.1.1 sets chest inspection at intervals not exceeding 12 months, and flag notices such as the Marshall Islands MN 7-042-1 restate it[1][2]. Compare the requirements by flag in our flag-state comparison.
What is the most common audit failure?
A missing document rather than a missing drug. On the controlled substances side it is copy 2 of the record of sale, which 21 CFR 1301.25(d) requires to be retained aboard[3]. See our recordkeeping guide.
Do US vessels face extra requirements?
Yes, and this is the layer most audit content omits. Carrying controlled substances on a US-linked vessel engages 21 CFR 1301.25, a DEA regime with its own registration, records and two annual reports[3]. US commercial fishing vessels also answer to 46 CFR 28.210[4]. See Controlled Substances.
What should we prepare before an audit?
Four things: the dated chest inspection record, the controlled substances record set including the aboard copies, the treatment log, and the MFAG kit inventory if you carry dangerous goods under the IMDG Code. Our MedChest service maintains the first two as standard.
