What Document Proves IMDG Compliance? MCA Oral Exam Guide for OOW and Chief Mate

The Essential Documents for IMDG Compliance

If you are asked in your OOW oral exam or Chief Mate assessment: "Which document is essential for proving compliance with the IMDG Code when carrying hazardous cargo?", the answer the question is looking for is the Dangerous Goods Declaration (DGD). It is the shipper's signed declaration that each consignment has been classified, packed, marked and labelled in accordance with the International Maritime Dangerous Goods (IMDG) Code.

But be ready for the follow-up: the DGD proves the cargo has been declared correctly. It does not prove the ship is fit to carry it. A strong answer names the ship's documents too (see below).

Why This Question Matters for Your MCA Oral Exam

The examiner tests your knowledge of the IMDG Code to make sure you understand your responsibility as an Officer of the Watch or Chief Mate for the safety of the vessel and crew. Dangerous goods carry risks of fire, explosion, toxic release or chemical reaction. The examiner is probing whether you can verify that the cargo on board is properly declared and that the ship is allowed to carry it where it is stowed.

The Examiner's Perspective

The examiner wants to hear that you understand the chain of responsibility: the shipper is responsible for correct classification, packing and documentation, and the Master and officers are responsible for checking that the documents are complete, consistent with the cargo presented, and that the ship can carry it safely.

Understanding the Dangerous Goods Declaration (DGD)

The DGD is a signed statement by the shipper that the goods are packed in accordance with the IMDG Code and are in a fit condition for transport. Every dangerous goods consignment must be accompanied by this documentation before it is loaded.

What the DGD Must Include:

• UN Number: The four-digit number assigned to the substance.
• Proper Shipping Name: As listed in the IMDG Code, with the technical name where required.
• Class (and Division): The hazard class, e.g. Class 3 Flammable Liquids, Class 8 Corrosives, plus any subsidiary hazard.
• Packing Group: The degree of danger (I, II, or III), where assigned.
• Flashpoint: Where it is 60°C or below.
• Marine Pollutant: Where applicable.
• Number and Kind of Packages and Total Quantity: Essential for stowage, segregation and emergency response.
• Shipper's Certification: A signed statement confirming the goods are properly classified, packaged, marked and labelled.

The Ship's Side: Document of Compliance and the DG Manifest

Expect the examiner to ask what proves the ship can carry the cargo. Know these:

• Document of Compliance for the Carriage of Dangerous Goods (SOLAS II-2/19): issued by or for the flag state, confirming the ship's construction and equipment are suitable for the classes of dangerous goods listed, space by space. Check that the cargo's class is permitted in the space you plan to stow it.
• Dangerous Goods Manifest or detailed stowage plan (SOLAS VII/4): a list of all dangerous goods on board and their location, kept on board and provided ashore before departure.
• Container or vehicle packing certificate: where goods are packed into a cargo transport unit, confirming it was packed in accordance with the IMDG Code.

Practical Application: The Officer's Responsibility

If you are asked, "What do you check when receiving dangerous goods?", your answer should include checking the DGD against the cargo presented (UN number, class, labels and placards), checking stowage and segregation against the IMDG Code and the Document of Compliance, and making sure the DG manifest is updated.

Common Pitfalls for Candidates

1. Mixing up the documents: The DG manifest (or detailed stowage plan) is a SOLAS requirement in its own right, listing what's on board and where. The DGD is the shipper's declaration for each consignment. You need both, and they must agree.
2. Relying on labels alone: Labels and placards must match the DGD. Without the declaration, the cargo is not properly documented.
3. Failure to link to the regulations: Mention that the IMDG Code is mandatory under SOLAS Chapter VII (and MARPOL Annex III for marine pollutants). This shows the examiner you know where the requirements come from.
4. Not checking the emergency information: Know where to find the Emergency Schedule (EmS) for fire and spillage and the Medical First Aid Guide (MFAG). An examiner will be impressed if you explain how you would use them.

Preparation Strategy for the Oral Exam

Treat the documents as your first line of defence. If port state control inspects your dangerous goods, expect to produce the DG manifest, the Document of Compliance and the declarations behind them.

Quick-Fire Exam Tips:

• Be Precise: If asked which document is essential for the cargo, state clearly: "The Dangerous Goods Declaration." Then add the ship's Document of Compliance and DG manifest.
• Know the IMDG Structure: Volume 1 covers general provisions, packing, consignment procedures and stowage and segregation, while Volume 2 contains the Dangerous Goods List.
• Master the Emergency Schedules: If a fire or spill involves dangerous goods, you refer to the EmS number given in the Dangerous Goods List for that UN number.

Conclusion

The Dangerous Goods Declaration is the cornerstone of each consignment's paperwork, but compliance is proven by the ship's documents as well. For any candidate, whether at 3000GT or Unlimited level, be ready to explain the DGD, the Document of Compliance and the DG manifest, and why each matters for the safety of the vessel, the environment and the crew.

Updated 25 October 2026: added the ship's Document of Compliance (SOLAS II-2/19) and the DG manifest (SOLAS VII/4), and corrected the list of DGD contents.