The international rulebook for carrying dangerous goods by sea, published by the IMO. It sets classification, packing, marking, documentation, stowage and segregation requirements for ocean freight and is updated on a two-year cycle. Its air counterpart is the IATA Dangerous Goods Regulations; US ground follows 49 CFR. Booking DG by ocean means meeting the IMDG edition in force.
Full guideDangerous goods documentation: what has to match, and why one line holds the shipment →