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IMDG stowage categories
['Hazmat: Water']
- Stowage categories offered by the IMDG Code identify whether a material can be stored on deck, under deck, or is prohibited.
The International Maritime Dangerous Goods (IMDG) Code uses stowage categories to identify if cargo can be stored On Deck, Under Deck, or Prohibited. Column 16a of the Dangerous Goods List displays the stowage category for each material. Stowage categories are split into two groups, Class 1 and Classes 2 - 9.
Stowage Category for Class 1 (Other than Division 1.4S packed in limited quantity)
| Stowage Category 01 | |
| Cargo Ships (Up to 12 passengers) | On deck in closed cargo transport unit or under deck |
| Passengers Ships | On deck in closed cargo transport unit or under deck |
| Stowage Category 02 | |
| Cargo Ships (Up to 12 passengers) | On deck in closed cargo transport unit or under deck |
| Passengers Ships | On deck in closed cargo transport unit or under deck in closed transport unit |
| Stowage Category 03 | |
| Cargo Ships (Up to 12 passengers) | On deck in closed cargo transport unit or under deck |
| Passengers Ships | Prohibited* |
| Stowage Category 04 | |
| Cargo Ships (Up to 12 passengers) | On deck in closed cargo transport unit or under deck in closed transport unit |
| Passengers Ships | Prohibited* |
| Stowage Category 05 | |
| Cargo Ships (Up to 12 passengers) | On deck only in closed cargo transport unit |
| Passengers Ships | Prohibited* |
| *- Except in accordance with Chapter 7.1.4.4.6 | |
Stowage Category for Classes 2 – 9 (Including Division 1.4S packed in limited quantity)
| Stowage Category A | |
| Cargo ships or passenger ships carrying up to 25 passengers or 1 passenger per 3-meter overall length, whichever is greater | On deck or under deck |
| Other passenger ships in which the limiting number of passengers transported is exceeded | On deck or under deck |
| Stowage Category B | |
| Cargo ships or passenger ships carrying up to 25 passengers or 1 passenger per 3-meter overall length, whichever is greater | On deck or under deck |
| Other passenger ships in which the limiting number of passengers transported is exceeded | On deck only |
| Stowage Category C | |
| Cargo ships or passenger ships carrying up to 25 passengers or 1 passenger per 3-meter overall length, whichever is greater | On deck only |
| Other passenger ships in which the limiting number of passengers transported is exceeded | On deck only |
| Stowage Category D | |
| Cargo ships or passenger ships carrying up to 25 passengers or 1 passenger per 3-meter overall length, whichever is greater | On deck only |
| Other passenger ships in which the limiting number of passengers transported is exceeded | Prohibited |
| Stowage Category E | |
| Cargo ships or passenger ships carrying up to 25 passengers or 1 passenger per 3-meter overall length, whichever is greater | On deck or under deck |
| Other passenger ships in which the limiting number of passengers transported is exceeded | Prohibited |
Always check IMDG Code Chapter 7 for any additional stowage requirements or provisions that may be required for the dangerous goods.