Alternative Fuel Milestones: Ammonia Propulsion Enters Commercial Service as World's Largest LNG Carrier Breaks Ground

## Alternative Fuel Milestones Mark a Pivotal Week for Maritime Decarbonisation The maritime industry has reached two significant milestones in alternative fuel propulsion this week, underscoring the sector's accelerating transition away from conventional bunker fuels. ### World's First Oceangoing Ammonia-Fuelled Vessel Delivered Belgian gas shipowner and infrastructure provider Exmar has taken delivery of what is widely regarded as the world's first oceangoing vessel powered by a dual-fuel ammonia engine, according to Splash247. The 46,000 cubic metre midsize gas carrier *Antwerpen* was handed over by South Korea's HD Hyundai Heavy Industries, marking a watershed moment for ammonia as a viable marine fuel. The delivery represents the transition of ammonia propulsion from a theoretical decarbonisation pathway to commercial operational reality. Ammonia — which produces no direct CO2 emissions when combusted — has long been identified by the International Maritime Organization and industry bodies as one of the most promising zero-carbon fuels for deep-sea shipping. However, technical challenges around toxicity, combustion stability, and engine development have slowed its adoption. The *Antwerpen*'s entry into service is expected to provide critical real-world operational data that could accelerate broader fleet adoption and inform regulatory frameworks around ammonia bunkering infrastructure. ### World's Largest LNG Carrier Begins Construction in China In a separate development, construction has commenced on what will become the world's largest LNG carrier, according to Seatrade Maritime. The vessel, ordered by QatarEnergy, is being built at Hudong-Zhonghua Shipbuilding in China — a yard that currently holds nearly 60 LNG carrier newbuilding orders on its books, reflecting the extraordinary scale of global LNG fleet expansion. The keel-laying marks another step in QatarEnergy's ambitious fleet expansion programme, which is closely tied to the North Field expansion project — one of the largest LNG production developments in history. The record-breaking vessel size signals continued confidence in long-term LNG demand, even as the industry debates the fuel's role as a transition energy source versus a long-term solution. ### Broader Significance Taken together, these two developments illustrate the dual-track nature of maritime's energy transition: LNG continues to attract massive capital investment as an established lower-emission fuel, while next-generation zero-carbon alternatives such as ammonia are crossing the threshold from pilot projects into commercial deployment. Industry observers will be watching the *Antwerpen*'s operational performance closely as a bellwether for ammonia's future in deep-sea shipping.