IMDG Code Volume 2 — Explained
IMDG Code Volume 2 — Explained
The IMDG Code Volume 2 is a practical, operational reference used by seafarers, shipping companies, freight forwarders, and port authorities for the safe transport of dangerous goods by sea. While Volume 1 explains the rules and principles, Volume 2 is all about application—it tells you exactly how to ship a specific dangerous substance safely and legally.
1. Purpose of IMDG Code Volume 2
The main purpose of Volume 2 is to support correct identification, packing, stowage, segregation, and emergency handling of dangerous goods. It acts as a ready-reference manual during cargo planning, loading, inspection, and onboard operations. Officers on board ships—especially Chief Officers and Third Officers—use this volume daily when dealing with hazardous cargo.
2. Dangerous Goods List (DGL)
The heart of Volume 2 is the Dangerous Goods List (DGL), arranged by UN Number from UN 0001 onward. Each entry provides critical information, including:
- Proper Shipping Name (PSN)
- Hazard Class and Subsidiary Risk
- Packing Group (I, II, or III)
- Marine Pollutant status
- Special Provisions
- Packing Instructions
- Stowage and Segregation Requirements
- Emergency Schedules (EmS)
This list ensures that everyone involved in transport uses standardized terminology and handling procedures, reducing the risk of accidents.
3. Emergency Response Information (EmS)
Volume 2 contains EmS codes, which guide the crew on how to respond in case of fire or spillage involving dangerous goods. Each substance has two codes:
- Fire Schedule (F-)
- Spillage Schedule (S-)
These schedules give step-by-step instructions such as:
- Firefighting media to use or avoid
- Protective equipment required
- Actions to prevent environmental contamination
This section is especially critical during emergencies, when quick and correct action can save lives and prevent pollution.
4. Medical First Aid Guide (MFAG)
Another vital part of Volume 2 is the Medical First Aid Guide (MFAG). It provides medical treatment advice in case crew members are exposed to hazardous substances through inhalation, skin contact, ingestion, or eye exposure.
MFAG includes:
- Symptoms of exposure
- Immediate first-aid measures
- Advice for radio medical consultation
For ships operating far from shore, this guidance is often the first and only medical reference available.
5. Packing Instructions and Special Provisions
Volume 2 explains how dangerous goods must be packed, including:
- Approved types of packaging
- Maximum quantities per package
- Conditions for limited quantities or excepted quantities
Special Provisions clarify exceptions, additional requirements, or relaxations for specific substances. Understanding these provisions helps prevent non-compliance and cargo rejection at ports.
6. Stowage and Segregation Tables
Safe carriage does not end with packing. Volume 2 provides clear stowage and segregation rules, ensuring incompatible substances are kept apart to avoid dangerous reactions. It specifies whether cargo must be:
- On deck or under deck
- Separated “away from,” “separated from,” or “separated by a complete compartment”
These rules are essential during cargo planning and lashing operations.
7. Practical Importance Onboard
In day-to-day shipboard operations, Volume 2 is used to:
- Verify cargo declarations
- Prepare dangerous goods manifests
- Plan safe stowage
- Train crew in emergency response
- Pass Port State Control (PSC) inspections
Failure to follow Volume 2 can lead to detention, fines, cargo damage, fires, explosions, or pollution incidents.
Conclusion
IMDG Code Volume 2 is the hands-on operational guide for handling dangerous goods at sea. By providing detailed cargo-specific instructions, emergency response guidance, and medical advice, it plays a crucial role in protecting lives, ships, and the marine environment. For anyone involved in maritime cargo operations, mastering Volume 2 is not optional—it is essential for safe and compliant shipping.