RightShip operates a greenhouse gas (GHG) emission rating that is increasingly being used in its ship vetting process.

But the rating system has drawn criticism from owners, which say it is too crude and relies on very basic parameters that do not accurately reflect a vessel’s emissions performance.

Chief executive Martin Crawford-Brunt strongly defends the system, saying it is good enough as an approximation of a ship’s emissions performance and will play a part in reducing emissions.