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LNG Bunkering

GTT: Co-mingling of LNG bunkers from different sources ‘simply an operational issue’

LNG marine fuel does not suffer from various potential off spec and stability issues seen in marine fuel oil when mixed, confirms General Manager of GTT S.E.A.

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The co-mingling of liquefied natural gas (LNG) bunker fuel from different sources is safe and simply an operational issue, says the General Manager of GTT South East Asia.

Stephane Maillard confirmed the fuel composition of LNG is well-known throughout the world and the material does not suffer from potential off spec and stability issues seen in traditional marine fuel oil when mixed.

However, operators will need to be aware that different locations offer different quality of LNG (in terms of its methane number) and the additional of a new LNG bunker stem into an existing tank is expected to change when different

He was answering a question from Manifold Times on the side lines at The Impact of Maritime Digitalization on the Future of Shipping and LNG seminar organised by Ascenz Solutions on Thursday (17 January).

“You will find different LNG qualities [methane number] around the world and mixing them together is possible; it is just an operational question of how to avoid cold rollover,” he says.

“This is relative to the density of the LNG fuel or design of the tanks that allow LNG to be poured either from the top or the bottom [to avoid cold rollover]. Otherwise, there is totally no issue.”

A LNG cold rollover happens when two separate layers of different densities exist in a tank, according to the International Group of Liquefied Natural Gas Importers.

As the density of two layers approach each other, the two layers mix rapidly, and the lower layer which has been superheated gives off large amount of vapour as it rises to the surface of the tank.

The main hazard from a rollover incident is the rapid release of large amounts of vapour leading to potential over-pressurisation of the tank.

“It is common to get information of the LNG quality before any transfer operation [such as in a LNG bunkering operation] though quality in terms of methane number can change a little bit after bunkering,” informs Maillard.

“It is just the initial loading. If you still have a bit of LNG in the fuel tank and pour the new LNG bunker fuel stem inside the tank, chances of cold rollover are very low.

“But if the tank is half full and you want to top up, you have to be aware of a change in quality [methane number]; if there is very low volume of LNG bunkers in the tank initially then it is ok.

“The part which needs more attention will be the engines. Fortunately, it is common for LNG engines to be able to run effectively on a range of methane number.”

Photo credit: Ascenz
Published: 25 January, 2019

 

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Alternative Fuels

Report: MSC Cruises ships operated on over 9,800 mt of bio-LNG and biofuels in 2025

MSC Group’s Cruise Division used 9,839 mt of renewable marine fuels in 2025 across its fleet, according to its 2025 Sustainability Report published last week.

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Report: MSC Cruises ships operated on over 9,800 mt of bio-LNG and biofuels in 2025

MSC Group’s Cruise Division used 9,839 metric tonnes (mt) of renewable fuels in 2025 across its fleet, according to its 2025 Sustainability Report published last week. 

The company used a combination of bio-LNG and biofuels across its fleet, resulting in emissions reduction of 48,714 mtCO2e compared to equivalent fossil fuels. 

Based on the Energy Transition Plan, the report showed that MSC Cruises and Explora Journeys remain on track to achieve net-zero greenhouse gas (GHG) emissions for marine operations by 2050. In 2025, MSC Group’s Cruise Division achieved the International Maritime Organization’s (IMO) 2030 carbon intensity reduction target five years ahead of schedule. 

The report said the MSC Cruises demonstrated a net-zero voyage using biomethane was possible with the launch of MSC Euribia in 2023. 

Since then it has actively engaged with fuel producers and suppliers to secure affordable high quality renewable fuels and in 2026, it began blending them into its operations at scale. 

The bio-LNG it sourced in 2025 was produced from a variety of different sustainable feedstocks, including food waste, sewage sludge, organic municipal waste and, most notably, manure. 

As most of its fleet remains conventionally powered, biodiesel represents the only drop-in solution available for these vessels today. 

In 2025, MSC Europa ran on a total of 6,856 mt of bio-LNG while MSC Opera used 1,727 mt of hydrotreated vegetable oil (HVO). MSC Seaview sailed using 572 mt of HVO and 684 mt of a B24-VLSFO blend. 

 

Photo credit: MSC Cruises
Published: 3 June, 2026

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LNG Bunkering

Roatán marks first STS LNG bunkering operation with Carnival cruise ship

According to Francesco Scarso, Senior First Engineer of Carnival Cruise Line, the event marked the first-ever ship-to-ship LNG bunkering operation to take place in Roatán.

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Roatán marks first STS LNG bunkering operation with Carnival cruise ship

Carnival Cruise Line’s LNG-powered flagship, Carnival Jubilee, recently bunkered LNG marine fuel in Roatán, Honduras.

According to Francesco Scarso, Senior First Engineer of Carnival Cruise Line, the event marked the first-ever ship-to-ship (STS) LNG bunkering operation to take place in Roatán.

“​I recently acted as the Person in Charge (PIC) for the inaugural Ship-to-Ship (STS) LNG bunkering operation ever to take place in Roatán, Honduras—fueling Carnival Cruise Line’s beautiful LNG-powered flagship, the Carnival Jubilee,” he said in a social media post. 

“Executing a cryogenic transfer for an Excel-class vessel in a brand-new location brings immense responsibility. From coordinating with port authorities to managing strict safety zones, ensuring ESD link integration, the operation required total focus and zero room for error.”

He added that ​this successful operation marked a giant leap forward for sustainable shipping and the expansion of LNG fueling options.

 

Photo credit: Francesco Scarso
Published: 2 June, 2026

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Business

Hercules Tanker Management acquires five product and chemical tankers

Acquisitions form part of a broader and ongoing fleet development programme at Hercules; programme also includes investing in the construction of an 18,000 cbm LNG bunkering vessel at Hyundai Mipo.

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Hercules Tanker Management plans fleet expansion with new chemical bunker tankers

Hercules Tanker Management (HTM) on Monday (1 June) announced the acquisition of five product and chemical tankers as part of its continued fleet expansion.

HTM is the shipping venture launched by John A. Bassadone, founder and CEO of independent marine fuel supplier Peninsula.

The company acquired STI Madison (2014 LR2), STI Brooklyn (2015 MR2) and STI Black Hawk (2015 MR2) – acquired from Scorpio Tankers; and Nord Marvel (2020 MR2) and Nord Maverick (2020 MR2) – acquired from Norden.

 The acquisitions represent a combined investment of approximately USD 225 million, with all vessels secured on long-term commercial charters, reinforcing Hercules’ strategy of pairing asset ownership with contracted earnings visibility.

“The acquisitions have been completed against the backdrop of a firm tanker asset market, with second-hand values continuing to trade at historically elevated levels due to strong freight markets, constrained fleet growth and limited shipyard availability,” the company said. 

 All five vessels enter the Hercules fleet with long-term commercial employment already secured, consistent with the company’s strategy of combining asset-backed exposure to tanker markets, with downside protection through contracted earnings, and operational flexibility to serve the growing global cargo flows of its partners and affiliates.

The acquisitions form part of a broader and ongoing fleet development programme at Hercules. 

The company continues to progress its newbuilding programme with Jiangmen Hangtong Shipyard in China, where it has committed to a series of up to 10 ‘ultra-spec’ chemical tankers, designed with flexibility to supply conventional fuels, biofuels and methanol, alongside enhanced efficiency and emissions performance. 

In parallel, Hercules is also investing in next-generation energy infrastructure through the construction of an 18,000 cbm LNG bunkering vessel at Hyundai Mipo, scheduled for delivery in 2027.

Market benchmarks indicate vessels of this type are currently contracting at approximately USD 90–95 million per unit, underlining the strategic and capital commitment behind this segment.

John A. Bassadone, Founder and CEO of Hercules Tanker Management, said: “This is another step in building Hercules carefully and deliberately. We are not trying to grow for growth’s sake. Our focus is on acquiring the right assets, at the right time, with the right commercial backing.

“These vessels come with strong employment already in place, which provides stability, while still allowing us to participate in a market we believe has solid fundamentals over the medium term. We are fortunate to be in a position where global cargo flows can underpin our investments, and we remain mindful that discipline is critical in this cycle.

“Additionally, we are currently engaged in negotiations for newbuilds of all sizes including LR2s, MRs, and Handys, as well as additional ultra spec vessels.”

Related: Peninsula founder launches shipping firm Hercules Tanker Management
Related: Hercules Tanker Management plans fleet expansion with new chemical bunker tankers
Related: Hercules Tanker Management orders LNG bunkering vessel from Hyundai Mipo

 

Photo credit: Hercules Tanker Management
Published: 2 June, 2026

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