CARGO SHORTAGE CLAIMS: WHEN THE NUMBERS DO NOT MATCH

 

CARGO SHORTAGE CLAIMS: WHEN THE NUMBERS DO NOT MATCH

In dry bulk shipping, a difference between ship and shore figures can trigger a costly dispute. Accurate surveys, reliable records and timely action can make the difference between a defensible claim and avoidable exposure.

ShipOpsInsights with Dattaram | Britannia Loss Prevention | October 2026

A bulk carrier finishes discharging. The receiver claims that hundreds of tonnes of cargo are missing. The terminal's records support one quantity, while the vessel's draft survey indicates another.

The ship is preparing for its next voyage. The Master is under pressure to complete formalities, the receiver wants an explanation, and the Owners' Operations Desk must decide how to respond.

What appears to be a simple difference in cargo figures can quickly develop into a dispute involving cargo liability, the bill of lading, survey costs, legal expenses and P&I Club support.

The critical question is not simply, “How much cargo is missing?”

It is: What do the available facts establish, where did the difference arise, and can the Owners demonstrate their position with reliable evidence?

That is the real challenge of cargo shortage prevention.

1. A shortage allegation is not proof of cargo loss

Britannia P&I's Bulk Carrier Cargo Claims Review 2025, covering registered claims from 2021 to 2024, reported that around 50% of the bulk-carrier cargo claims in its review related to shortage.

This finding highlights the importance of the issue for dry bulk shipowners.

However, a discrepancy between loading and discharge figures does not automatically establish that cargo has physically disappeared.

Three situations must be distinguished:

• Measurement discrepancy: Differences arise from draft-survey calculations, shore weighing systems, recorded quantities or documentation.
• Actual cargo loss: Cargo is physically lost through spillage, pilferage, mishandling or other causes.
• Combined discrepancy: Measurement differences and actual cargo loss both contribute to the final figure.

The distinction determines what the Owners must investigate.

For example, a receiver may report a shortage based on shore scales, while a properly conducted vessel draft survey supports a different outturn. The discrepancy requires investigation of both measurement systems and the cargo-handling records.

Neither party's figure should be accepted blindly.

Practical takeaway: Treat every significant shortage allegation as an evidence-based investigation. Do not admit liability prematurely, but do not dismiss a claim without examining its supporting facts.

2. The most dangerous decision may happen before the voyage begins

Consider a vessel loading 75,000 MT of cargo. The terminal reports 75,000 MT, but the vessel's draft survey indicates 74,500 MT.

The difference is 500 MT.

The shipper nevertheless requests a bill of lading for 75,000 MT.

This is a critical decision point for the Master and Owners' Desk.

If the quantity recorded in the bill of lading materially exceeds the quantity actually loaded, the carrier may face serious exposure. The legal effect depends on the document's wording, the governing law and the circumstances, but the discrepancy must not be ignored.

The Master should promptly notify Owners, preserve the survey evidence and obtain appropriate instructions and legal or P&I guidance where necessary.

The team should investigate:

• Draft readings and water-density measurements.
• Ballast soundings and consumable quantities.
• Hydrostatic data and calculation corrections.
• The ship's constant and any unexplained change.
• Terminal weighing records and calibration information.
• Any spillage, interrupted loading or abnormal cargo-handling event.

A material discrepancy should be investigated before loading is completed whenever practicable.

Practical takeaway: Do not allow commercial pressure or a terminal's insistence to replace accurate cargo figures and proper documentary control.

3. Draft surveys: essential evidence, not an automatic answer

A draft survey calculates cargo quantity indirectly from changes in vessel displacement. Its reliability depends on the quality of observations, measurements and calculations.

A competent surveyor must consider draft readings, trim, list, water density, hydrostatic data, ballast, bunkers, fresh water, sludge and other relevant weights.

Errors in any of these inputs can distort the calculated cargo quantity.

Gard's guidance discusses approximately 0.5% as a possible accuracy level for a properly conducted draft survey under suitable conditions. West P&I notes that typical accuracy can vary between 0.5% and 1.0%.

These are indicative figures—not a universal legal tolerance, a guarantee of accuracy or an automatic defence against liability.

For 75,000 MT of cargo, a difference of 0.5% represents 375 MT. That is commercially significant, but the cause and legal meaning of the difference must be established from the facts.

Particular attention should be paid to the ship's constant. A substantial unexplained change between loading and discharge surveys may indicate errors in draft readings, tank soundings, recorded consumables or other calculation inputs. It does not automatically prove cargo loss.

Practical takeaway: Retain the raw survey readings, calculation sheets, density measurements, ballast records and signed survey reports. The final figure alone is not enough to explain a disputed quantity.

4. Discharge operations need the same discipline as loading

Shortage claims often become more difficult to defend when evidence is collected only after discharge has finished.

At higher-risk ports, Owners should consider arranging an experienced surveyor before discharge starts. Where practicable, agree the survey procedure with the relevant parties and conduct opening and final draft surveys, with intermediate surveys when necessary.

During discharge, the vessel's team should monitor:

• Grab condition and cargo spillage.
• Cargo falling into the water or remaining on the quay.
• Cargo retained in holds after discharge.
• Quantities discharged into barges, stockpiles or warehouses.
• Differences between vessel figures and shore records.

If the receiver alleges a shortage, request the calculation, survey report and supporting measurements in writing.

Where appropriate, the Master should issue a Letter of Protest, record the vessel's own figures and seek Owners' instructions. A Letter of Protest documents a concern; it does not, by itself, settle the question of liability.

Practical takeaway: Arrange survey attendance before the evidence becomes difficult to recover, not after the claim has been raised.

5. Multiple receivers and ports can hide the source of a discrepancy

A bulk carrier may discharge cargo into several barges, warehouses, stockpiles or receivers. The vessel's total delivery may be correct even when an individual receiver alleges a shortage against its bill of lading.

Multi-port voyages create another risk. An excess discharge at an earlier port may affect the quantity available at the next port.

Owners should maintain a clear reconciliation showing the bill of lading number, receiver, cargo grade, planned quantity, actual quantity delivered and remaining cargo onboard.

Opening and final draft surveys at each discharge port can help establish the quantity remaining and identify where the discrepancy may have arisen.

The aim is to reconcile the whole voyage—not merely investigate the last receiver's complaint in isolation.

Practical takeaway: Track cargo by receiver and discharge port, while maintaining a cumulative reconciliation against the vessel's total intake.

6. Moisture loss must be supported by evidence

Coal, iron ore fines, concentrates, fertilisers and agricultural cargoes may contain moisture. Changes in moisture can affect wet cargo mass without an equivalent loss of dry solids.

The basic relationship is:

[
\text{DMT}=\text{WMT}\times(1-\text{moisture fraction})
]

For example, 75,000 WMT at 8% moisture represents 69,000 DMT.

However, this calculation does not automatically justify a deduction from the bill of lading quantity. The contract, measurement basis, sampling method and evidence of the cargo's condition must be considered.

For relevant cargoes, the Master and Chief Officer should preserve hold-bilge sounding and pumping records, cargo-condition observations, sampling records where applicable, and evidence of any unusual water ingress or removal.

Moisture loss, drainage or rain exposure must not be assumed to explain a shortage without supporting evidence.

Practical takeaway: Establish the actual cause of a weight difference before attributing it to moisture change or natural loss.

7. Build a fleet-wide shortage-prevention system

The strongest approach is to standardise the controls used by Masters, surveyors and the Owners' Desk.

Before loading

• Confirm the contractual quantity, tolerance and measurement basis.
• Check whether the transaction uses wet or dry metric tonnes.
• Establish a reliable baseline draft survey.
• Verify relevant vessel measurements and records.
• Arrange independent survey attendance where the risk justifies it.

During loading

• Compare ship and shore figures at meaningful intervals.
• Investigate material discrepancies immediately.
• Obtain terminal weighing and calibration records where available.
• Record spillage, rain interruptions and abnormal operations.
• Ensure cargo documents accurately reflect the facts and applicable requirements.

During the voyage

• Monitor hatch-cover integrity and access controls as appropriate.
• Record seal numbers and changes.
• Maintain hold-bilge and cargo-condition records.
• Preserve relevant logbook entries, photographs and correspondence.

During discharge

• Arrange appropriate opening and final draft surveys.
• Monitor spillage, cargo retained onboard and delivery quantities.
• Reconcile each receiver's figures against the vessel's total outturn.
• Request written particulars of alleged shortages.
• Preserve original survey reports and supporting evidence.

Digital reconciliation tools, timestamped photographs and a voyage-specific evidence folder can improve traceability. Fleet-level claims analysis can also identify recurring issues by port, cargo, terminal or surveyor.

Technology should support competent measurement and recordkeeping, not replace them.

Practical takeaway: Make shortage prevention a standard fleet process, rather than relying on individual experience or reacting only when a claim arises.

8. What each team must do

Masters: Verify survey inputs, record discrepancies accurately, protect documentary integrity and seek instructions before signing materially discrepant cargo documents.

Owners' Operations Desk: Reconcile ship and shore figures, escalate significant differences, coordinate surveyors and preserve the decision trail.

Technical and marine teams: Support reliable vessel measurements and investigate recurring survey or equipment issues.

Chartering and commercial teams: Review cargo quantity clauses, tolerances and documentary requirements. Seek appropriate advice where contractual exposure is unclear.

Young officers: Understand the purpose of survey inputs, maintain contemporaneous records and report unexplained differences promptly.

P&I and claims teams: Advise on evidence preservation, correspondents, security and the appropriate response to disputed claims.

A coordinated response matters because a technically sound survey can lose value if the supporting documents are incomplete or the discrepancy is reported too late.

Executive insight: Evidence is the Owners' first line of defence

Cargo shortage claims cannot always be prevented. But avoidable exposure can be reduced through three disciplines:

Quantity. Establish a defensible cargo figure using reliable measurements.

Documentation. Preserve the evidence that explains material differences between loaded, carried and discharged cargo.

Response time. Escalate discrepancies early, involve Britannia when appropriate and avoid unsupported admissions or deductions.

For the Britannia Loss Prevention seminar, the most valuable questions are practical: What should a Master do when the requested bill of lading quantity exceeds verified intake? Which evidence best supports the vessel's outturn when shore figures differ? What additional safeguards should apply at ports with recurring shortage disputes?

Answers to these questions should become part of a fleet-wide standard operating procedure.

In cargo shortage claims, the strongest defence is not simply to dispute the number. It is to explain the number with reliable evidence.