DSD Shipping has added to its tally of firm MR tanker newbuildings at Hyundai Mipo Dockyard (HMD).

The Norwegian company is exercising an option in an ­order that has already seen it book four firm sisterships. They reportedly cost $32m each, which means the order now carries a $160m total price tag.

All the vessels will be delivered in 2019 and 2020.