goods to be transported by sea.
The introduction includes a
discussion of special requirements for freight containers, portable
Other introductory sections cover the carriage of
dangerous goods: on roll-on/roll-off (RORO) ships; in limited
quantities; on shipborne barges or barge-carrying ships; and under
controlled temperature conditions to maintain chemical stability.
Annex I to the General Introduction gives packing recommendations and
also a glossary with illustrations on the construction and testing of
Annex I also divides dangerous goods, other than those
covered by Classes 1, 2, and 7, into three packaging groups according
to the degree of danger they present. These groups include--
Packaging Group I: Goods presenting great danger.
Packaging Group II: Goods presenting medium danger.
Packaging Group III: Goods presenting minor danger.
Each class is preceded by an introduction which describes the
properties and definitions of the goods and gives details of stowage
and segregation (that is, the degree to which goods should be kept
separated from other dangerous substances or goods transported on a
The class introduction also gives information concerning
recommended loading and unloading procedures.
Each class is identified by a distinctive label or placard, some of
which will be familiar to road users since they appear on commercial
vehicles which transport dangerous goods (see Part C).
appropriate, each individual schedule in the code shows the label or
labels (100 mm x 100 mm) which should be affixed to a package or
placards (enlarged labels-250 mm x 250 mm) which should be affixed to
portable tanks, freight containers, or other transport units.
Goods in this class are also assigned to various stowage categories.
Stowage Category I (ordinary) covers goods which present relatively
little hazard. Category II involves magazine stowage of such goods,
and is divided into three groups.
Stowage Category III is for
pyrotechnics. Category IV is reserved for special items such as both