This 'classing' system ensures vessels are designed and built following regulations such as the number of life rafts or types of materials used.īut the Titan submersible that went missing en route to the Titanic wreck, is not classed, the blog post said. In a 2019 blog post on OceanGate’s website, the company said most marine operations “require that chartered vessels are ‘classed’ by an independent group such as the American Bureau of Shipping (ABS), DNV/GL, Lloyd’s Register, or one of the many others.”