Maritime is certainly targeting green ammonia as a future fuel to meet decarbonisation goals, but regulators say many unknowns still linger.

Aside from being virtually carbon-free and abundant in supply, not much else is known about how it would work out as a safe bunker fuel for vessels at sea, said Ulrik Frorup, commercial director for marine and offshore at classification society Bureau Veritas.

“We have to remember that we are on a learning curve when it comes to ammonia,” he told TradeWinds.