Your comprehensive guide to marine equipment certification, classing and the risks involved with non-standardised equipment in the offshore industry. Working in harsh environments requires clear safety regulations and equipment specifications. In the offshore industry, subsea and diving equipment and processes are certified and classed to ensure that they conform to these regulations. But what does it mean to be certified, classed or non-classed? Here we discuss each process and the differences when it comes to specific subsea and diving equipment such as diving systems, pressure vessels and man riding equipment, among others.