Overview
Bunker surveying is specialist survey work around the delivery of fuel for a ship's own use. The surveyor may be instructed to witness measurements, review documents, monitor the transfer and preserve evidence relevant to delivered quantity or a later dispute.
For maritime professionals, the useful question is not only “what does the term mean?” but “what evidence would show that the work was performed properly?” This guide therefore focuses on the practical link between the governing framework, onboard or cargo-side activity, and the records a competent professional would expect to see.
Key Points to Understand
IMT conceptual illustration for learning purposes; not an official regulatory flowchart.
Practical Process
The exact method must always be adapted to the vessel, cargo, company procedures, local rules and the scope of the assignment. A disciplined sequence helps keep evidence complete and prevents the work from drifting away from its objective.
- Confirm nomination, parties, fuel grades and survey scope.
- Review available tank, meter and delivery information before transfer.
- Witness the agreed measurement sequence and record times/events.
- Track documents and any protest or irregularity contemporaneously.
- Reconcile figures and issue a factual report with calculations and limitations.
Common Mistakes
Most weak inspections, surveys and audits do not fail because the professional forgot a complicated formula. They fail because scope, evidence or follow-up became unclear. Watch especially for:
- Assuming all ports use the same bunker procedure.
- Using outdated standards without checking the current edition.
- Treating a surveyor's attendance as a guarantee of fuel quality.
Practical Checklist
This is an IMT working checklist, not a substitute for the applicable convention, code, flag requirement, port rule, company procedure or contractual instruction.
- Nomination reviewed
- Fuel grade identified
- Measurement method confirmed
- Transfer events logged
- Documents retained
- Calculations checked
- Exceptions protested/documented
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View the Training Programme →Frequently Asked Questions
Is bunker surveying only about quantity?
Quantity is a major focus, but survey scopes can also involve documentation, sampling attendance and evidence around delivery procedures.
Are bunker rules the same worldwide?
No. MARPOL creates international fuel-related obligations, while ports can also impose local procedures and standards.
Why is Singapore often referenced in bunker surveying?
It is a major bunkering hub with detailed published standards for bunker procedures and mass-flow metering.
Authoritative Sources
Regulatory statements in this guide are grounded in the following primary or official sources. Operational recommendations are presented as IMT practical guidance.
International Maritime Training (IMT) is an independent training provider. This educational guide is not issued by, affiliated with, or endorsed by IMO, ILO, MPA Singapore, or any other authority referenced above.