In the commercial shipping world, time is money — and nowhere is that more evident than during vessel handovers between Owners and Charterers. The moment a vessel goes on-hire or off-hire, financial responsibility shifts instantly, covering everything from bunker consumption to vessel condition.
To ensure fairness and transparency, On/Off-Hire Surveys are conducted — independent inspections that record the vessel’s fuel quantities, consumables, and physical condition at the exact point of delivery or redelivery.
At JM Marine Surveys, we perform these critical surveys across Northwest Europe, offering neutral, detailed, and defensible documentation that protects the commercial and operational interests of both Owners and Charterers.
What Is an On/Off-Hire Survey?
An On/Off-Hire Survey determines:
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The bunker quantities (fuel oil, diesel oil, lube oil) on board at the time of charter delivery or redelivery.
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The general condition of the vessel, including cargo holds, deck areas, accommodation, and machinery spaces.
It’s a technical assessment designed to verify that each party fulfills their charterparty obligations — fairly, accurately, and transparently.
Why These Surveys Are Critical to Owners and Charterers
The results of an On/Off-Hire Survey directly affect financial settlements between parties.
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Owners want confirmation that the vessel is returned in good condition with proper fuel levels.
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Charterers need assurance that the vessel was delivered as agreed, without pre-existing damage or fuel shortfalls.
Without an independent survey, both parties face the risk of costly claims and disputes — from bunker shortages to alleged damage or contamination.
The Dual Focus: Bunker Quantities and Vessel Condition
On/Off-Hire Surveys consist of two complementary inspections:
1. Bunker Surveys, and 2. Condition Surveys.
Both are performed simultaneously to create a full snapshot of the vessel’s operational state at the exact handover point.
Bunker Surveys – Measuring Fuel with Precision
Bunker quantity verification forms a crucial part of every on/off-hire inspection. JM Marine Surveys uses calibrated soundings, temperature-corrected volume tables, and density conversions to determine accurate fuel quantities on board.
We measure:
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Heavy Fuel Oil (HFO)
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Marine Diesel Oil (MDO)
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Marine Gas Oil (MGO)
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Lubricants and other consumables
Our team corrects all readings and verifies against bunker delivery notes and daily consumption logs.
This meticulous approach ensures no room for disagreement — just verifiable data.
Condition Surveys – Ensuring Accountability in Vessel Handover
Condition surveys assess the physical state of the vessel upon delivery or redelivery.
Our surveyors inspect and photograph:
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Cargo holds, hatches, and deck fittings
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Mooring equipment and cranes
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Accommodation and bridge areas
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Paintwork, corrosion, and hull marks
By comparing initial and final surveys, JM Marine Surveys helps determine whether any damage occurred during the charter period, protecting both Owner and Charterer from unfair claims.
Common Dispute Scenarios in Charter Handover
Case 1: Bunker Quantity Variations
A recurring source of conflict involves fuel differences between the Owner’s final report and the Charterer’s own readings. Variations often arise from incorrect temperature corrections, density errors, or improper soundings. JM Marine Surveys’ independent verification ensures consistency and traceability in every figure.
Case 2: Damage or Wear Allegations
Condition disputes can escalate quickly, especially when heavy weather or high port activity is involved. Independent photographic evidence from our surveys provides undeniable documentation that can prevent lengthy arbitration or insurance claims.
How JM Marine Surveys Protects All Parties Involved
JM Marine Surveys’ approach centers on neutrality, accuracy, and documentation — the three pillars of credible marine surveying.
Impartial Verification for Fair Settlements
We act strictly as independent third-party surveyors, ensuring that Owners, Charterers, and P&I Clubs all receive unbiased data suitable for settlement and record-keeping.
Detailed, Audit-Ready Documentation
Our final reports include:
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Sounding logs and calculation sheets
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Fuel temperature and density corrections
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Tank calibration references
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Photographic evidence of vessel condition
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A signed Statement of Facts
Each report is structured for compliance and charterparty transparency.
Technology and Methods Used by JM Marine Surveys
Measuring Bunker Levels Accurately
We employ:
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Calibrated sounding tapes and temperature thermometers
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Accurate reporting software
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Highly experienced surveyors with excellent track records
All instruments are verified and regularly calibrated to ensure traceable precision.
Recording Physical Condition with Photographic Evidence
High-resolution photos and video documentation accompany every report. These records are essential for insurance claims and operational transparency.
Frequently Asked Questions (FAQs)
1. What does an On/Off-Hire Survey include?
It covers bunker quantities, lubricants, and the vessel’s physical condition during charter delivery or redelivery.
2. Who requests the survey?
Usually, either the Owner or Charterer — but both benefit from the independent documentation.
3. How long does an On/Off-Hire Survey take?
Typically 6–12 hours, depending on vessel size, tank configuration, and access.
4. Why use an independent surveyor like JM Marine Surveys?
Impartial surveys prevent disputes, provide legal-grade evidence, and support P&I Club requirements.
5. Where does JM Marine Surveys perform these surveys?
We cover major Northwest European ports — including Rotterdam, Antwerp, Zeebrugge, Hamburg, and Bremen and work with local surveyors throughout the world.
6. Can JM Marine Surveys coordinate with P&I representatives?
Yes. Our surveyors often work alongside P&I surveyors, insurers, and ship agents to ensure seamless cooperation.
Conclusion: Transparency and Trust at Every Charter Transition
In every on/off-hire situation, timing and accuracy are paramount.
By engaging JM Marine Surveys, Owners and Charterers gain independent verification that protects commercial interests, prevents unnecessary disputes, and strengthens professional relationships.
Our detailed, P&I-compliant reporting ensures every transition — whether delivery or redelivery — is handled fairly, transparently, and efficiently.
👉 For independent On/Off-Hire Survey assistance in Northwest Europe, visit www.jmmarinesurveys.com or contact JM Marine Surveys directly for 24/7 availability.