Singapore is the world’s busiest bunkering port and a strategic hub for shipowners and charterers worldwide—including many Greek shipping companies. While the city-state is known for its structured and transparent marine fuel regulations, quantity disputes still occur, sometimes with costly consequences.
At Worldwide Surveys SM LTD, we’ve surveyed hundreds of vessels bunkering in Singapore. This post outlines practical steps you can take to avoid quantity disputes and ensure your operation runs smoothly and fairly.
Why Quantity Disputes Happen in Singapore
Despite Singapore’s stringent rules under the SS648:2022 Code of Practice for Bunker Mass Flow Metering (MFM), quantity discrepancies can still occur due to:
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Incorrect procedures by barge crews
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MFM manipulations or bypass risks
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Sediment or air entrapment in lines
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Vessel-side misinterpretations
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Lack of independent verification
Without a trained bunker surveyor onboard, owners or charterers may face discrepancies of 5–20 MT or more—costing tens of thousands of dollars per stem.

2. Verify the Bunker Barge’s Mass Flow Meter (MFM)
Singapore mandates MFM systems, but you must ensure:
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The meter is approved and sealed properly
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Zeroing is done correctly before delivery starts
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Sealing reports and calibration certificates are presented
A surveyor checks these steps are done transparently.
3. Monitor Pre-delivery Checks
Before bunkering starts:
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Ensure the bunker manifold valves are aligned properly
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Take initial ullages (if tank gauging is used)
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Confirm line flushing is done correctly
Even one shortcut at this stage can lead to a dispute.
4. Supervise the Drip Sampler and Sampling Points
Quantity is one side of the story, but quality also impacts settlement. Ensure:
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Drip sampling is continuous
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Sample bottles are correctly labeled and sealed
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The correct sample point is used (per MPA requirements)
5. Take Accurate ROB Measurements Pre/Post
Retained Onboard (ROB) fuel is a common dispute trigger:
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Always double-check vessel tanks before and after bunkering
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Surveyor should be present and verify sounding tapes and temperatures
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Record tank settling time accurately
6. Check for Air Entrainment or Short Delivery
Watch for:
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Foam or bubbles in the lines (air entrainment)
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Sudden changes in flow rate
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Early cutoff or fast line clearing
The bunker surveyor helps detect such red flags and documents them.
7. Document Everything
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Take timestamped photos of MFM readings, seals, and sampling
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Record flow rates, temperature, and density
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Get signatures from all parties on protest letters if needed
Documentation becomes critical evidence in arbitration or commercial claims.
Real-World Example: How We Helped a Greek Charterer Recover $22,000
In one recent case, a Greek charterer bunkering in Singapore was told the quantity was 1,500 MT. Our independent bunker survey revealed:
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Actual delivery was 1,482 MT
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Air entrapment was detected in the final flushing
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We issued a formal letter of protest with full evidence
This documentation helped our client negotiate a $22,000 settlement, covering the missing fuel and demurrage.
Final Thoughts: Don’t Rely Solely on Trust or MFM
While Singapore’s system is robust, disputes still occur. An independent bunker surveyor acts as your insurance policy—protecting your commercial interests, providing technical evidence, and deterring malpractice.
Ready to Book a Bunker Survey in Singapore?
Worldwide Surveys SM LTD offers:
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✅ MPA-compliant bunker surveys
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✅ 24/7 availability in Singapore
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✅ Reports accepted by P&I clubs and charterers
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✅ Competitive pricing with no surprises
📩 Contact us today at worldwide.surveyors@gmail.com
🌐 www.worldwideshipssurvey.com
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