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IMDG Code is intended to protect crew members and to prevent marine pollution in the safe transportation of hazardous materials by vessel. From its initial adoption in 1965 to 2004, the IMDG Code was recommendations for the safe transport of dangerous goods. [ 1 ]
Note: The asterisks are replaced by the class number and compatibility code Divisions 1.1–1.3 Explosives – Substances and articles which are classified as explosives but which present no significant hazard Note: The asterisk is replaced by the compatibility code Division 1.4
Some use graphic symbols, but without English wording or with similar wording in their national language. Refer to the dangerous goods transportation regulations of the country of interest. For example, see the TDG Bulletin: Dangerous Goods Safety Marks [5] based on the Canadian Transportation of Dangerous Goods Regulations.
The most common dangerous goods are assigned a UN number, a four digit code which identifies it internationally. Less common substances are transported under generic codes such as "UN1993: flammable liquid, not otherwise specified". The UN Recommendations do not cover the manufacturing, use or disposal of dangerous goods.
What is now the International Code of Signals was drafted in 1855 by the British Board of Trade and published in 1857 as the Commercial Code. It came in two parts: the first containing universal and international signals, and the second British signals only. Eighteen separate signal flags (see chart) were used to make over 70,000 possible messages.
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Under the UN Dangerous Goods classification, explosive hazard Divisions are awarded using the UN Manual of Criteria and Tests, by following the process flow chart '10.3 Procedure for assignment to a division of the class of explosives' and conducting the appropriate tests either UN series 5, series 6, or series 7 tests. [3]