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DNV GL: Green technologies enhance efficiency of shuttle tankers

LNG dual-fuel shuttle tankers demonstrate environmental sustainability and operational flexibility are commercially viable.

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Christening ceremony of Eagle Blane and Eagle Balder

Classification society DNV GL has published an article analysing and outlining how technology can meet environmental targets while boosting the efficiency of shuttle tankers; the article is written by Business Director Tankers, Catrine Vestereng.

AET, one of the leading petroleum tanker owners and operators, has a long tradition of naming its vessels after some of the greatest energy locales, cities or ports in the world. Their latest two dynamic positioning shuttle tankers (DPSTs) will join the “B” ship series and are named after the Eagle Blane and Eagle Balder oil and gas fields on the Norwegian continental shelf.

Meeting international emission regulations

Eagle Blane and Eagle Balder not only continue AET’s naming tradition but also underline the company’s commitment to preserving the environment through state-of-the-art green technology, expanding AET’s fleet of environmentally friendly ships.

The twin-skeg, 123,100 dwt sister vessels will emit 85% less SOx, 98% less NOx, 98% less particulate matter and 93% less black carbon particulates than ships burning conventional fuel. They meet the International Maritime Organization’s (IMO) target to reduce carbon intensity per transport of work by 40% against 2008 baselines by 2030, and halving CO2 emissions by 2050.

The vessels will serve the Norwegian energy company Equinor on long-term charter in oilfields on the Norwegian continental shelf on the North Sea, the Norwegian Sea and the southern Barents Sea, as well as on the UK continental shelf.

“These trading areas not only require compliance with the Global Sulphur Cap but also with the new Gothenburg Protocol in force from 2020, which requires volatile organic compound (VOC) emissions to be capped at 131,000 tons per year,” explains John Baptist, Global Director VLCC & Shuttle Tankers, Crude Shipping at AET.

A new prototype

Powered by liquefied natural gas (LNG) as primary fuel, the DPSTs will be able to capture 100% of the harmful VOCs which escape into the air from crude oil cargoes during loading and voyage. The captured VOCs will be used as a supplementary fuel. “These are AET’s first vessels constructed with a VOC recovery system and fuelled by LNG. Being prototype vessels of this type, there were risks. The design and newbuilding teams have worked with all stakeholders to produce a very environment-friendly vessel type,” summarizes John Baptist. “Being part of the VOC reduction initiative makes this project even more exciting.”

Samsung Heavy Industries (SHI) built the shuttle tankers for AET Sea Shuttle AS (AETSS), a joint venture between the Norwegian shipping company ADS Shipping and AET Tankers which is headquartered in Singapore. AETSS is the owner and commercial operator of the vessels. Project management for the newbuilds was provided by MISC Group’s marine services arm Eaglestar and the Norwegian third-party ship management company OSM Maritime. “The shipyard has played an important role during the newbuilding process and maintained an excellent partnership with the classification society, which resulted in high-end technology solutions whilst ensuring regulatory compliance,” Baptist reports. “The collaboration with class in this project was exceptional in terms of the technical review. DNV GL has shown a high degree of technical expertise in defining, analysing and resolving critical design and engineering philosophies to ensure safe operation. For us, our project partners added remarkable value not only to the vessel but also for our company, as it helps us elevate our reputation among the top environment-friendly service providers.” Vidar Dolonen, Regional Manager Korea and Japan at DNV GL – Maritime , said about the project: “With this dual-fuel shuttle tanker project, DNV GL also broke new ground and we collaborated closely with our experts in various disciplines.

Enhanced technologies for more efficient operation

The vessels use a more efficient computer-controlled system for dynamic positioning that keeps them stationary above a specified seabed area while loading oil. The combination of LNG fuel, a powerful VOC recovery system and a more efficient dynamic positioning system enables estimated fuel savings of up to 3,000 tonnes per year compared with conventional DPSTs of the same size.

“These vessels are proof that environmental sustainability and commercial viability can coexist and are also testament to the fact that operational performance does not have to be sacrificed in the pursuit of reducing emissions,” Capt. Rajalingam Subramaniam, AET President & CEO and Chairman of AETSS says. “The goal was always to leverage our combined experience of AET, ADS and SHI to develop vessels that really push the boundaries in what is possible in North Sea dynamic positioning operations, and to prove the value of LNG dual-fuel solutions in the energy shipping segment.”

During the naming ceremony in October 2019, Lady Sponsor Ann-Elisabeth Serck-Hanssen, Senior Vice President for Asset Management in Marketing, Midstream and Processing at Equinor, said: “Taking these vessels on a long-term contract will further enhance our ability to provide safe, efficient and cost-competitive energy to our customers, and we are proud to play our part in what is an important step forward in the development of more sustainable energy shipping solutions.”

Increased operating opportunities

The two DPSTs will each be propelled by two low-pressure dual-fuel two-stroke engines, which meet IMO Tier III emissions requirements in gas mode without any exhaust gas after-treatment required. Designed for harsh operating conditions, the ships are equipped with latest-generation bow-loading systems (BLS) which offer greater connecting angles, extending the operating opportunities in conditions where shuttle tankers would normally struggle to connect. “The new-generation BLS is capable of connecting the loading hose in wave heights up to Hs = 4.5 m and at an entering angle of 110 degrees,” Stein Are Andersen, Sales Manager Offshore Loading Systems, MacGregor, reports.

Asked about future design and technology developments for shuttle tankers, Baptist believes that green energy will be the top item on the agenda, in particular LNG, VOC and hydrogen as fuels, as well as power generation optimization using variable frequency drives (VFD) batteries. Bow-loading system design has been improving and will continue to evolve to achieve more efficient offshore loading operations. “The demand for shuttle tankers as replacements of ageing tonnage is increasing. In my estimate about 40% of the existing tanker fleet is ready for replacement due to the 20-year age limitation,” Vidar Dolonen points out.

Related: AET names twin LNG dual fuelled DP shuttle tankers at ceremony


Photo credit and source:
DNV GL
Published: 24 February, 2020

 

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Legal

Singapore police arrest eight over alleged illegal MGO transaction off Tuas

SPF says preliminary investigations found that crew members of a Singapore-registered tugboat misappropriated MGO worth about SGD 10,570 without their company’s knowledge and sold it illegally.

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Singapore police arrest eight over alleged illegal MGO transaction off Tuas

The Singapore Police Force (SPF) on Thursday (13 August) said it has arrested eight men, aged between 25 and 54, for their suspected involvement in an illegal transaction of Marine Gas Oil (MGO).

On 13 August 2026 at about 1.05am, officers from the Police Coast Guard (PCG) conducted a check on a Singapore-registered tugboat in the waters off Tuas and discovered that eight crew members were possibly involved in the illegal transaction of MGO. 

“Preliminary investigations revealed that the crew members of the tugboats misappropriated MGO valued at about SGD 10,570 (USD 8,258), without their company’s knowledge,” SPF said in a statement.

“The MGO was sold illegally for their personal financial gain.”

The eight crew members will be charged in court on 14 August 2026 with the offence of theft by servant of property in possession of master under Section 381 of the Penal Code 1871 If convicted, they shall be punished with an imprisonment term that may extend to seven years and shall also be liable to fine.

“The Police take a serious view of illegal transaction of MGO in Singapore Territorial Waters and will continue to conduct enforcement and security checks to prevent, deter and detect such illicit activities in Singapore waters,” SPF added. 

 

Photo credit: Singapore Police Force
Published: 14 August, 2026

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Port & Regulatory

Gard: Sulphur-related bunker claims rise amid tighter China MSA enforcement

Claims involving excessive sulphur content in marine fuels have been rising, while stricter inspections by the China MSA have heightened the focus on sulphur compliance, particularly in the Bohai Sea.

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shraga kopstein on Unsplash

Maritime protection and indemnity (P&I) club Gard on Wednesday (12 August) highlighted that claims involving excessive sulphur content in marine fuels have been rising, while stricter inspections by the China MSA have heightened the focus on sulphur compliance, particularly in the Bohai Sea:

Rise in off-spec sulphur claims

Recent claims experience indicates that bunker quality continues to pose a significant operational risk for shipowners. In our earlier review of bunker-related claims during the first five months of 2026, we highlighted a rise in off-specification bunker incidents amid increased pressure on global fuel supply chains following the escalation of the conflict in the Middle East. 

Specifically for Sulphur compliance, between January and June 2026, the number of sulphur-related cases increased by more than threefold compared with the same period in 2025. Notably, the number of cases recorded in the first six months of this year has already exceeded the total number reported during the whole of last year by approximately 40%. 

While each case is fact-specific, the increase is notable because excessive sulphur content constitutes a MARPOL compliance issue. Unlike many other bunker quality problems, sulphur non-compliance identified through port state inspections can result in vessel delays, enforcement action, and substantial costs associated with debunkering and fuel disposal. 

The map below illustrates the geographical distribution of sulphur-related claims recorded during the first six months of 2026, based on the location where the bunkers were stemmed.

Distribution of sulphur related claims

China MSA steps up sulphur compliance enforcement

According to our correspondent, Huatai, on 5 June 2026, the maritime authorities of Tianjin, Hebei, Liaoning and Shandong jointly launched a special campaign on ship pollution prevention and control in the Bohai Sea region. The campaign involves coordinated supervision by local MSA branches across the region and is expected to last nearly five months. It covers major ports and surrounding port areas in the Bohai Sea region, including Tianjin, Tangshan, Qinhuangdao, Huanghua, Jinzhou, Yingkou and Longkou. 

While the initiative is broader than bunker sulphur compliance alone, its scope includes inspections relating to air pollution prevention, SOx emissions, fuel compliance and other high-pollution-risk operations. Enforcement measures are expected to comprise onboard inspections, cross-regional enforcement activities, unannounced spot checks and remote monitoring. These efforts will be supported by a combination of UAV patrols, maritime patrol vessels, shore-based monitoring systems and rapid on-site fuel testing. 

As a result, vessels trading in the Bohai Sea region may experience increased scrutiny of fuel compliance documentation, fuel sampling records, onboard fuel management procedures, and the handling or disposal of suspected non-compliant fuel.

Documents typically requested by China MSA

Based on our recent experience, including the case discussed above, and subject to the specific requirements of the local MSA office, owners and operators may be requested to provide supporting documentation such as: 

  • Bunker documentation – Bunker Delivery Notes (BDNs), MARPOL fuel sample records, fuel test reports, and relevant fuel quality certificates. 
  • Statutory certificates – including the International Air Pollution Prevention (IAPP) Certificate and International Oil Pollution Prevention (IOPP) Certificate. 
  • Operational records – engine logbooks, deck and navigation logbooks, Oil Record Book entries, and records relating to fuel transfers, storage and consumption. 
  • Sampling documentation – the Master’s statement and any records demonstrating how fuel samples were drawn, sealed, labelled, handled and retained. 
  • Correspondence records – communications with the authorities, bunker suppliers, charterers and other relevant stakeholders. 
  • Fuel disposal records – approved disposal plans, debunkering documentation, receipts and evidence of final disposal, where applicable. 

The exact documentation required will depend on the nature of the investigation, the findings of the inspection, and the requirements of the local enforcement authority. 

Possible regulatory consequences in China

Under the Air Pollution Prevention and Control Law of the People’s Republic of China, ocean-going vessels are required to use fuel oil meeting atmospheric pollutant control requirements after berthing. Vessels operating within designated emission control areas must also comply with applicable emission standards. Article 106 provides that where vessel fuel oil fails to meet applicable standards or requirements, the competent maritime authorities may impose fines ranging from RMB 10,000 to RMB 100,000. Liability may extend to shipowners, ship operators and ship managers depending upon the circumstances of the case. 

Recommendation

Sulphur compliance should be treated as both a fuel quality and regulatory risk. Owners and operators are encouraged to take preventive steps before bunkering, act promptly if non-compliant fuel is suspected, and preserve evidence carefully if an inspection or claim arises. Under amended 

Resolution A.1206(34), Appendix 18, 2.1.5, if the BDN shows compliant fuel, but the master has independent test results of the fuel oil sample taken by the ship during the bunkering which indicates non-compliance, the master may document this by notifying the ship’s flag Administration, with copies to: 

  • the competent authority of the relevant port of destination, 
  • the Administration under whose jurisdiction the bunker deliverer is located, 
  • and to the bunker deliverer.

 

Photo credit: shraga kopstein on Unsplash / Gard
Published: 14 August, 2026

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LNG Bunkering

Shell expands LNG bunkering footprint in Spain with Valencia

As one of the region’s key maritime hubs, the company said Valencia expands the options available to shipowners seeking LNG supply along major shipping routes.

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Shell expands LNG bunkering footprint in Spain with Valencia

British oil giant Shell on Thursday (13 August) said Valencia has joined its growing network of bunkering locations, making LNG available as a marine fuel.

The successful completion of the first LNG bunkering operation in Valencia marked an important milestone for Spain and further strengthened Shell’s LNG supply capabilities across the Mediterranean. 

In a video shared by the company, bunkering vessel Alice Consulich was shown supplying an undisclosed volume of LNG to the container ship MSC Sabrina.

“As one of the region’s key maritime hubs, Valencia expands the options available to shipowners seeking LNG supply along major shipping routes,” Shell said in a social media post. 

Shell said the achievement reflected the strong collaboration across the maritime value chain, including MSC Mediterranean Shipping Company, the Port of Valencia and Fratelli Cosulich Group.

“We look forward to making more LNG bunker deliveries in Valencia and across the Mediterranean as LNG infrastructure and capabilities continue to expand,” the company said. 

 

Photo credit: Shell
Published: 14 August, 2026

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