A study into real-life carbon savings for Marubeni Group’s fleet showed emissions could be cut by up to 7.3% from vessel optimisation but highlighted how collaboration between shipowners and charterers is essential to achieve the savings.

The study involving Finnish software firm NAPA and Japan’s ClassNK involved “retro-optimising” voyage information to incorporate weather routing and data on sea conditions for a group of bulk carriers owned and operated by Marubeni.