Leading flag states and shipowner associations have called on maritime regulators to consider safety concerns over the implementation of a 0.5% limit on the sulphur content of fuel from 2020.

A hard-hitting paper presented to the IMO outlined potential risks associated with ships that have been designed to run on heavy fuel oil switching to ultra low sulphur alternatives.

It was sponsored by the Marshall Islands, Liberia, Bimco, the International Chamber of Shipping, Intertanko and Intercargo.