Yara Clean Ammonia (YCA), the world’s largest trader and distributor of ammonia, on Friday (13 June) announced its key role in a landmark maritime decarbonisation initiative led by the Global Centre for Maritime Decarbonisation (GCMD).

The successful completion of the first-ever ship-to-ship transfer (STS) of ammonia at anchorage in Western Australia marks a major milestone in paving the way for ammonia as a viable marine fuel, it said.

Under the supervision of the Pilbara Port Authority (PPA), the pilot took place within the anchorage area of Port Dampier, simulating real-world bunkering conditions and demonstrating that ammonia transfer can be executed safely and effectively offshore.

According to YCA, the trial builds on the insights from GCMD’s prior safety study in Singapore and confirms that, with the right controls in place, ammonia STS transfers at anchorage are both safe and scalable.

The pilot has also generated crucial real-world data and best practices for future ammonia bunkering operations globally.

“This successful trial is a pivotal step towards building trust in ammonia as a zero-to-near-zero emission (ZNZ) maritime fuel,” said Murali Srinivasan SVP Commercial in Yara Clean Ammonia.

“It’s the result of world-class collaboration and careful planning—and it shows that with the right safeguards, ammonia bunkering is not only feasible but practical.”

Photo credit: Yara Clean Ammonia
Published: 17 June 2025

Bunker fuel sales at Singapore port inched forward by 1.1% on year in May 2025, the highest volume seen in 2025, according to Maritime and Port Authority of Singapore (MPA) data.

In total, 4.88 million metric tonnes (mt) (exact 4,878,100 mt) of various marine fuel grades were delivered at the world’s largest bunkering port in April, up from 4.83 million mt (4,826,800 mt) recorded during the similar month in 2024.

Deliveries of marine fuel oil, low sulphur fuel oil, ultra low sulphur fuel oil, marine gas oil and marine diesel oil in May (against on year) recorded respectively 1.89 million mt (+8.6% from 1.74 million mt), 2.45 million mt (-7.2% from 2.64 million mt), 1,200 mt (from zero), 1,700 mt (-88% from 14,300 mt) and zero (from zero).

Bio-blended variants of marine fuel oil, low sulphur fuel oil, ultra low sulphur fuel oil, marine gas oil and marine diesel oil in May (against on year) recorded respectively 40,900 mt (+671.7% from 5,300 mt), 95,800 mt (+97.9% from 48,400 mt), 700 mt (from zero), zero (from zero) and zero (from 300 mt). B100 biofuel bunkers, introduced in February this year, recorded 1,900 mt of deliveries in May.

LNG and methanol sales were respectively 45,000 mt (-7.8% from 48,800) and zero (from 1,600 mt). There were no recorded sales of ammonia for the month and so far in 2025.

Related: Singapore: Bunker fuel sales increase by 4% on year in April 2025
Related: Singapore: Bunker fuel sales increase by 0.5% on year in March 2025
Related: Singapore: Bunker fuel sales down by 8.1% on year in February 2025
Related: Singapore: Bunker fuel sales down by 9.1% on year in January 2025

A complete series of articles on Singapore bunker volumes reported by Manifold Times tracked since 2018 can be found via the link here.

Photo credit: Maritime and Port Authority of Singapore
Published: 16 June 2025

The Global Centre for Maritime Decarbonisation (GCMD) on Friday (13 June) launched its Path to Zero-Carbon Shipping – Insights from ammonia transfer trial in the Pilbara report.

The document captures key learnings from a pilot involving the ship-to-ship transfer of liquid ammonia between two gas carriers — the Green Pioneer and the Navigator Global — at anchorage off Port Dampier in the Pilbara, Western Australia.

The trial demonstrated that ship-to-ship ammonia transfer at anchorage can be both safe and practicable, provided that recommended safeguards and operational controls are implemented.

To share these crucial learnings with the industry, the report offers quantitative insights from executing the trial, forming a reference for future pilots and eventual commercial-scale operations.

The report offers:

Project background and objectives: An overview of the trial’s goals and operational context

Detailed safety studies covering four key areas:

• Feasibility: Response motions and mooring analysis
• Risks: HAZID and HAZOP findings and mitigations
• Consequences: Computational Fluid Dynamics (CFD) plume dispersion modelling
• Response: Emergency Response measures and protocols

Operation execution overview: A detailed account of the actual transfer operation, including the Joint Plan of Operations (JPO), assets deployed and a timeline of key events.

Optimising ammonia bunkering: Operational recommendations for both bunker tankers and receiving vessels, covering aspects such as transfer system setup, manifold arrangement, sample collection and more. A checklist of ERP resources required onboard is also included.

“In the past, bunkering guidelines took years to develop and were typically derived from experience with actual operations,” said Professor Lynn Loo, CEO of GCMD.

“In this case, guideline development is preceding actual commercial-scale operations, making it all the more important that these trials are as informative and comprehensive as possible so they can serve as a relevant reference for industry bodies in refining safe handling procedures, emergency response plans, and operational guidelines.”

Note: The full report of Path to Zero-Carbon Shipping – Insights from ammonia transfer trial in the Pilbara can be downloaded here.

Photo credit: Global Centre for Maritime Decarbonisation
Published: 16 June 2025