As the shipping industry edges closer to its 2050 net-zero target, the search for workable alternatives to heavy fuel oil has never been more urgent. What once seemed a distant ambition has now become a technical, regulatory and financial imperative.

But which fuels will lead the charge? The Motorship’s recent series of special reports explored three of the front-runners — ammonia, nuclear, methanol and biofuels — each at different stages of maturity and facing distinct challenges. Together, they offer a snapshot of a sector in transition: technically ambitious, sometimes divided but steadily gathering momentum, albeit at different paces,