Also known as: OPA-
OPA has various meanings in the Nautical Terms category. Discover the full forms, definitions, and usage contexts of OPA in Nautical Terms.
The American rules on the safety of transport of hydrocarbons by sea. Provisions apply to tanker structure, with the requirement that new tankers should be built with a double hull or other similar design. It also introduces a tougher inspection system of existing ships, making it obligatory for ships to have an emergency action plan on board.
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