IMCA aims to improve performance in the marine contracting industry worldwide. IMCA members are offshore, marine and underwater engineering contractors and their partners in the offshore oil, gas and renewable energy industries.
InterManager is the international trade association for the ship management industry--in-house or third party ship managers, crew managers or related organisations and related maritime businesses and organisations.
IACS is a not for profit membership organisation of classification societies that establish minimum technical standards and requirements that address maritime safety and environmental protection and ensures their consistent application.
ITOPF maintains a worldwide database of accidental oil spills from tankers, combined carriers and barges. This is used to generate statistics on numbers and sizes of spill, and to identify the causes of spills.