On/Off Hire Bunker Surveys
Independent Bunker Quantity Verification at Delivery and Redelivery
On/Off Hire Bunker Surveys is an independent inspection carried out to determine the exact quantity of fuel onboard a vessel at the time of delivery into, or redelivery from, a charter party agreement.
The survey establishes the vessel’s ROB (Remaining On Board) quantities, including Fuel Oil (FO), Diesel Oil (DO), and Marine Gas Oil (MGO). These figures are used to calculate fuel consumption and settle financial differences between owners and charterers.
An on-hire bunker survey establishes the fuel quantities at the start of the charter, while an off-hire bunker survey confirms the remaining quantities at completion. These verified figures are used to calculate fuel consumption and form the basis for settlement between owners and charterers.
Ruswal Global provides accurate, independent bunker quantity surveys across UK and international ports, supporting owners, charterers, and operators.
Industry Experience You Can Rely On
Our surveyors have hands-on experience conducting bunker quantity surveys across a wide range of vessel types and operational conditions.
We understand the practical challenges involved, including:
- Variations in tank calibration tables
- Temperature and density corrections
- Restricted access and time-sensitive operations
- Differences in vessel reporting practices
This experience allows us to deliver consistent and reliable results, even in complex or high-pressure situations.
Why On/Off Hire Bunker Surveys Are Critical
Fuel discrepancies can lead to significant financial exposure. Independent verification at key stages of the charter helps protect all parties.
Our surveys provide:
- Accurate measurement of bunker quantities onboard
- Transparent and defensible figures for both parties
- Reduced risk of disputes and claims
- Confidence in fuel reconciliation and reporting
Our Survey Methodology
We follow a structured and proven inspection process to ensure accuracy and consistency:
- Measurement of all bunker tanks (soundings and/or ullages)
- Temperature measurement and density verification
- Application of vessel calibration tables
- Cross-checking of logs, records, and bunker documentation
- Sampling of fuel, where required
All findings are recorded and issued in a clear, detailed report suitable for commercial and legal reference.
For a more detailed breakdown of procedures and calculations, see our Bunker Quantity Surveys page.
Independent and Professional Reporting
As an independent inspection company, Ruswal Global acts solely in the interest of accurate measurement and reporting.
Our reports are:
- Objective and unbiased
- Prepared in accordance with industry standards
- Delivered promptly to support operational timelines
Where We Operate
Ruswal Global provides On/Off Hire Bunker Surveys across the UK, Europe, and worldwide.
We have surveyor coverage at major UK ports including Liverpool and Felixstowe, as well as regional ports such as Newport and Portbury Dock.
Across Europe, we support operations in key hubs including Rotterdam, Europoort, and Antwerp-Bruges, as well as wider ARA region ports.
Through our global network, we are able to respond quickly to survey requirements worldwide.
Why Choose Ruswal Global?
- Proven experience in bunker quantity surveys
- Qualified and experienced marine surveyors
- Independent, third-party inspections
- Coverage across the UK, Europe, and worldwide
We provide dependable inspection services designed to minimise risk and support fair commercial outcomes.
To arrange an On/Off Hire Bunker Survey or request further information, contact our team today.
Request a Quote Today
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