Maharani Freeport, a National Project officially launched by His Majesty Sultan Ibrahim, King of Malaysia, in November 2025, will be introducing mass flowmeter (MFM) and electronic bunker delivery note (e-BDN) technologies to its bunkering operations, learns Manifold Times.

These strategic initiatives underscore the port’s commitment in establishing a highly transparent, efficient and trustworthy bunkering environment, aligned with global best practices and addressing critical industry demands, according to a Maharani Energy Gateway (MEG) spokesperson.

MEG is the Master Developer of Maharani Freeport and seeks to position the Freeport as a strategic nexus for shipment, storage and trading operations on a global scale. MEG Synergy is the trading division and a wholly owned entity of MEG; it seeks to position Maharani Freeport as a strategic nexus for shipment, storage, and trading operations on a global scale.

As part of its long-term bunkering strategy, the Freeport is currently in the process of acquiring bunker vessels of various sizes to support marine fuel deliveries and accommodate the evolving requirements of regional and international customers. These vessels will be equipped with MFM technology to ensure accurate, transparent and efficient fuel transfer operations.

Including bunkering and ship-to-ship (STS) trading operations from its High Sulphur Fuel Oil (HSFO) Floating Storage Unit (FSU), MEG Synergy already oversees a healthy volume of Bunker cargo deliveries to regional players each month.

MFM for Trust, Transparency and Traceability

MEG highlighted the custody transfer of bunker fuels at the Freeport will be handled by MFM-equipped bunker tankers.

“The adoption of MFM technology to support bunkering operations is a direct response to persistent industry challenges such as quantity discrepancies and delivery disputes,” explained the spokesperson.

“By equipping our bunker vessels with certified mass flowmeters, we aim to ensure precise and verifiable fuel delivery measurements.

“This initiative is pivotal in fostering trust among customers and strengthening the Freeport’s reputation as a professionally managed zone where businesses can operate with confidence. The overarching goal is to create a secure and well-governed environment for commercial activities, reducing operational risks and uncertainties while supporting efficient and transparent trade.”

e-BDN to Digitalise Documentation Workflow

The implementation of electronic bunker delivery notes (e-BDN), together with MFM technology, further aligns with the Freeport’s focus on creating comprehensive digital custody transfer records and robust data retention systems, added the spokesperson.

This digital approach, integrated with MFM technology, will streamline operational workflows, reduce administrative burdens and provide an immutable record of transactions to enhance transparency, minimising potential friction and expediting dispute resolution

MEG emphasised that the Freeport’s commitment extends beyond technological enhancements to encompass a comprehensive governance framework.

The port aims to adhere to stringent international standards, including those established by the International Maritime Organization (IMO), while offering dispute resolution mechanisms under the International Chamber of Commerce (ICC) to ensure the swift and fair handling of disagreements.

This holistic approach to operational integrity and governance is designed to address perceived transparency gaps, positioning the Freeport as a reliable and commercially attractive hub for the maritime and commodities sectors.

Note: For enquiries in respect of Maharani Freeport, readers may reach out to:

[email protected]

Related: Interview: Maharani Energy Gateway – Forging a new energy nexus in the Straits of Malacca
Related: New Johor bunkering hub: Maharani debuts as Malaysia’s first duty-exempted energy freeport

Photo credit: Maharani Energy Gateway
Published: 15 July 2026

While Mass Flow Meters have significantly improved transparency and accuracy in bunker deliveries, experience shows that they are not immune to misuse, writes Alvin Forster, Senior Loss Prevention Executive – Americas & UK of global marine insurer NorthStandard:

Bunker quantity disputes remain one of the most frequent and contentious causes of claims and charterparty disputes. Traditional measurement methods based on tank soundings, ullage measurements and calibration/sounding tables have long been criticised for susceptibility to error and manipulation. In response, some of the major bunkering ports have mandated the use of Mass Flow Meters (MFMs) as the primary means of measuring the quantity transferred.

MFMs have significantly improved transparency and accuracy, but experience has shown that they are not immune to misuse or deliberate manipulation. Recent enforcement actions, most notably in Singapore, demonstrate that unscrupulous suppliers may attempt to defeat even sophisticated measurement systems.

Singapore pioneered the mandatory use of MFMs. Since 1 January 2017, MFMs have been compulsory for the delivery of marine fuel oil in the Port of Singapore, with the delivered quantity on the Bunker Delivery Note (BDN) derived exclusively from the MFM totaliser.

The regime has continued to evolve. From 1 April 2025, Singapore mandates compliance with SS 648:2024, which tightens requirements around data security, system integrity, piping arrangements, certification, and the use of data loggers and edge devices, reflecting lessons learned from earlier enforcement cases.

Mass appeal for MFMs

From 1 January 2026, MFMs have also been made mandatory on bunker vessels delivering fuel oil, diesel and biofuels at the ports of Rotterdam and Antwerp‑Bruges. The systems must be certified and broadly aligned with ISO 22192, mirroring the Singapore model. The use of MFMs is mandatory across port terminals in Türkiye and at the Port of Ceuta in the Gibraltar Strait, while they are also used in Gibraltar by yacht bunker supplier CEPSA, and others.    

These developments signal a significant shift in the European bunker market, which has traditionally been reliant on shore tank measurements and barge gauging.

Elsewhere, Sohar Port and Freezone have introduced measures that effectively mandate the use of MFMs for bunker supplies. Hong Kong is also looking to introduce regulations that mandate their use, but only for methanol.

Further afield, an increasing number of suppliers are adopting the use of MFMs in ports and hubs where there is no mandate.

Locations where MFMs are currently used on a non-mandatory basis include Fujairah, Zhoushan, Busan, Houston and Prince Rupert (Canada).

Manipulation against the flow

Despite the broadening appeal, and the tamper‑resistant design work that has gone into MFM solutions, there have been instances that show they can still be manipulated through physical or operational interference.

The most well‑known example concerns the bunker tankers Southernpec 6 and Southernpec 7 in Singapore. Between 2016 and 2019, industrial‑strength magnets were placed on the MFM sensors to distort measurement signals, causing the meters to record more fuel than was actually delivered. The fraud resulted in buyers being cheated of over US$300,000 worth of marine fuel oil.

Another recurring manipulation method involves irregular piping arrangements between the MFM and the ship’s manifold. Investigations in Singapore revealed cases where bunker barges had connections allowing fuel to be siphoned back to barge tanks during delivery, inflating MFM readings without the receiving vessel receiving the corresponding quantity.

Such arrangements directly contravene certification requirements but may be difficult for ship crews to detect without detailed inspection.

MFMs have defined operational limits, calibrated for liquid at constant flow. When removing the final amounts from a tank, flow rates may fall outside these parameters, and risk producing unreliable readings.

Guidance for Shipowners and Operators

Despite the increased use of MFMs and the introduction of mandates in some ports, the crew of the receiving vessel should remain vigilant with respect to the way these systems can be manipulated and take measures to protect their position. As a matter of routine, crew should:

• Always take ship’s bunker tank soundings and witness barge measurements before and after bunkering, even where MFM figures are contractually binding, and retain records.
• Inspect visible sections of MFM systems, including seals, cabling, and piping.
• Request to see the MFM bunker system certificate and confirm the unit’s serial number.
• Engage reputable, experienced bunker surveyors.  
• Issue letters of protest promptly where discrepancies arise between ship calculations and MFM figures, even if suppliers refuse to countersign.
• Ensure crews are familiar with bunkering procedures and aware of common manipulation indicators.

Crew should also be aware of the limitations in accuracy when comparing tank measurements with MFM readings. Even when both measurement technologies are accurate, differences can still exist between them.

Photo credit: NorthStandard
Published: 3 July, 2026

Hong Kong-based marine fuel supplier Chimbusco Pan Nation (CPN) on Tuesday (16 June) announced that its bunker barge Zhong Ran 23 has become the first vessel in Hong Kong listed on the Marine Department’s official List of Quality Bunker Vessels.

The list under the Quality Bunker Operator Scheme launched on 3 June.

“The Scheme is a voluntary initiative designed to raise the standard of bunkering accuracy, transparency, and service quality in Hong Kong,” CPN said in a social media post.

“To be listed, a bunker vessel must have its Mass Flow Meter (MFM) system independently certified under ISO 22192, the international benchmark for mass flow metering in bunkering operations.”

CPN added it has operated the MFM system across our fleet of fuel oil barges since 2015. 

Manifold Times previously reported Hong Kong’s Marine Department (MD) launching the Quality Bunker Operator Scheme to encourage bunker operators to install and use mass flow meter systems (MFM systems) on their bunker vessels.

MD said the scheme aims to enhance Hong Kong’s bunkering service quality and the competitiveness of Hong Kong ports, thereby further consolidating Hong Kong’s position as an international maritime centre and a major bunkering port.

Under the Scheme, bunker operators of traditional maritime fuel and biodiesel that install and use MFM systems on their bunker vessels, with the MFM systems inspected and certified by an accredited body in accordance with the International Organization for Standardization’s ISO 22192 Standard or equivalent requirements, can apply to the MD for inclusion in the scheme’s “List of Quality Bunker Vessels”, provided they meet the relevant technical and operational requirements. 

Related: Hong Kong backs MFM adoption with voluntary scheme to boost bunkering competitiveness

Photo credit: Chimbusco Pan Nation
Published: 17 June, 2026