A marine or cargo survey is an independent inspection of cargo, usually carried out by a qualified surveyor with no stake in the outcome, and it exists to answer one of three questions: what condition and quantity was this cargo in before it left, how much of it actually crossed the ship's rail, or what happened to it and who is responsible. Which survey you need depends entirely on which of those questions you are trying to answer, and calling the wrong one, or calling too late, is how a recoverable claim turns into an argument about missing evidence.
The three questions a survey answers
Surveys are commissioned at different points in a shipment for different reasons. A pre-shipment survey establishes a baseline before the cargo moves. A draft survey measures bulk cargo quantity using the ship itself as the scale. A condition and damage survey investigates loss after the fact. All three can involve the same surveyor and the same clipboard of measurements, photographs and sampling records, but they are commissioned by different parties, at different moments, for different purposes.
1. Pre-shipment and loading surveys
A pre-shipment survey is an independent check of a cargo's condition and quantity before it is loaded, and it is most common on bulk commodities, second-hand machinery and project cargo, where the buyer has no way to inspect the goods themselves and disputes over pre-existing damage are common. The UK P&I Club, one of the larger mutual insurers of shipowner liability, publishes its own guidance on pre-load surveys for finished steel products specifically because steel cargo claims frequently turn into arguments about whether rust or mechanical damage was already present before the ship ever took the cargo aboard. The Club notes that "a properly conducted pre-load steel survey can assist in establishing the apparent condition of the cargo before shipment and support the accurate description of the cargo condition in shipping documents," while being explicit that the survey does not certify the underlying quality of the steel or guarantee there is no hidden defect. It records what a surveyor could reasonably see, nothing more.
The same logic extends well beyond steel. Buyers of second-hand machinery and project cargo commonly make payment under a letter of credit conditional on an inspection or survey certificate being presented among the shipping documents, precisely because the goods are used, non-standard, and impossible to fully assess from a written description alone. If your sale contract or letter of credit names a survey as a condition of payment, check the exact wording of that clause with your bank or trade finance contact before booking the shipment: what counts as an acceptable certificate, and who is an acceptable surveyor, is defined by the contract, not by general custom.
2. Draft surveys for bulk cargo
A draft survey calculates the weight of bulk cargo loaded or discharged by measuring how much the ship itself has risen or sunk in the water, and converting that change in displacement into a cargo weight using the vessel's own hydrostatic and displacement tables. It is the standard method for verifying quantity on commodities such as grain, ore and coal, where physically weighing the cargo as it crosses the rail is not practical.
Gard, a major protection and indemnity club for shipowners, explains the purpose plainly in its own guidance on defending shortage claims: "draft surveys of bulk cargoes are a means of checking that the shipper's figures inserted in the bill of lading are correct." Gard recommends the survey be carried out both immediately after loading and again before discharge, so there is an independent figure at each end of the voyage rather than only the shipper's own load-port number. On accuracy, Gard states that "the accuracy of a draft survey which has been properly performed is generally regarded as being up to more or less 0.5 per cent of the final figure for dry bulk cargoes," and that a shortage claim beyond that tolerance is difficult for a shipowner to explain away as measurement error rather than real loss. Gard is also direct about what happens without one: "without this evidence, the shipowner can sometimes do little more than argue" against a shortage claim. A draft survey turns a dispute over a number on a bill of lading into a dispute that has actual measurements behind it.
3. Condition and damage surveys
A condition and damage survey is called after loss or damage has already been discovered, typically during discharge or on arrival at the consignee, to document what happened, how bad it is, and what most likely caused it. The National Cargo Bureau, a US non-profit that provides marine surveying services, describes these surveys as conducted "on behalf of ship owners, operators, and charterers as well as logistics service providers, cargo insurers or P&I clubs," involving a detailed inspection of the affected cargo to determine "aspect, nature and extent of the damage" alongside collection of documents and physical inspection of holds, tanks or the cargo itself to establish cause.
Speed matters here in a way that has real legal teeth, not just practical convenience. Under the Hague-Visby Rules, the treaty that governs liability on most bills of lading issued for international ocean carriage, Article III Rule 6 states that unless notice of loss or damage is given in writing to the carrier "before or at the time of the removal of the goods," or within three days if the damage is not apparent at the time of delivery, that removal is treated as prima facie evidence the goods were delivered in the condition described on the bill of lading. In plain terms: stay silent past that window and the burden shifts against you. The same clause carries the reason joint surveys matter so much in practice: it explicitly states that "the notice in writing need not be given if the state of the goods has, at the time of their receipt, been the subject of joint survey or inspection." A joint survey, where both the carrier's and the receiver's surveyors inspect the cargo together and agree the findings on the spot, satisfies the notice requirement by itself and heads off a dispute over whose figures to trust later.
Roanoke Insurance Group, a US-based marine cargo insurer, gives the same urgency from the claims-handling side of a damage case. Its own guidance tells policyholders to "contact a surveyor to assess the loss/damage immediately" and to "preserve all packing, damaged goods and seals until advised otherwise," warning that carrier notification deadlines can be as short as a few days for an ocean shipment. Moving, repairing or discarding damaged cargo before a surveyor has seen it is one of the most common ways a genuine claim gets weakened, because once the evidence is gone, no report can recreate it.
4. Who appoints and pays for a survey
There is no single answer, because it depends on whose interest the survey protects.
- Pre-shipment surveys are typically commissioned by the buyer, or required of the seller under the sale contract or letter of credit, and paid for by whichever side the contract assigns the cost to. Where a P&I club supports the survey, as the UK P&I Club does for steel, the cost is usually covered for the shipowner member subject to their terms of entry.
- Draft surveys are generally arranged and paid for by the shipowner in the first instance. Gard notes the cost "is normally for the Member's account," though it can be recovered later if the report is used successfully to defend a shortage claim.
- Condition and damage surveys can be commissioned by any interested party: the consignee, the carrier, a P&I club, or the cargo insurer who will ultimately pay the claim. Whoever needs the finding to stand up usually pays for the surveyor who produces it.
A joint survey, where the cargo interest's surveyor and the carrier's surveyor attend together and sign off on a shared set of findings, is common practice specifically because it avoids the situation where each side produces its own report and the numbers do not match. As the Hague-Visby exception above shows, a joint survey can also satisfy a legal notice requirement on its own.
5. What a good survey report actually contains
Insurers, adjusters and courts rely on a survey report because of what it documents, not because of who signed it. A report that will hold up under scrutiny generally includes photographs taken at the time of inspection, precise measurements rather than visual estimates, a clearly stated sampling method where only part of a bulk or palletised cargo was physically checked, and the surveyor's own qualifications. On that last point, check that the surveyor holds a real, checkable accreditation rather than taking a claimed credential on trust. The International Institute of Marine Surveying (IIMS), which describes itself as "an independent, non-political organisation" that "promotes the professionalism, recognition and training of marine surveyors worldwide," offers a specific Cargo and Commercial Ship Marine Surveying qualification and maintains a searchable member directory, so a claimed IIMS membership can actually be checked rather than assumed. Other countries have their own recognised national surveying bodies; the point is that the accreditation should be confirmable, not merely stated.
A practical checklist: what to do when damage turns up
- Do not move, repair or discard the cargo before it has been inspected, unless doing so is necessary to stop further loss. Preserve packaging, seals and the damaged goods themselves.
- Notify the carrier in writing as soon as damage is found or suspected, ideally before the goods leave the carrier's custody. If damage is not apparent until later, do it within days, not weeks: the exact window depends on the mode and the contract of carriage, and the Hague-Visby three-day rule above is one well-known example, not a universal one.
- Notify your cargo insurer or the relevant P&I correspondent immediately, by phone first so the message is received without delay, then follow up in writing with the details.
- Call a surveyor straight away, and where possible push for a joint survey with the other side's surveyor present, rather than two separate inspections producing two different reports.
- Photograph everything and keep every document: the bill of lading, packing list, any pre-shipment or draft survey report from earlier in the voyage, and the delivery receipt.
Surveys, insurance and where to read more
A survey report is evidence, not a payout. What it actually recovers depends on the cargo insurance policy behind it, and getting that policy right before cargo ever moves matters more than any single survey after the fact. Cargo Insurance Explained covers why carrier liability limits alone are rarely enough to rely on, and what cargo insurance does not cover is worth reading before you assume a survey finding will automatically be paid out. If a bank or buyer is asking for specific paperwork around a policy, marine cargo insurance documents explains the certificate, policy and open cover forms that survey and claims teams actually ask to see. And if the dispute has moved past the survey stage into an actual claim against a forwarding business, handling a cargo claim against your forwarding business covers that process directly.
Finding a forwarder or surveyor who has actually handled your cargo type and trade lane before is worth the extra look, particularly on project cargo or second-hand machinery where a pre-shipment survey is likely to matter. You can search listings by country and service in the CargoLinked directory, or post your shipment to the public requests board and let forwarders with relevant experience respond.
Notice periods, survey costs and accreditation requirements vary by cargo type, contract of carriage and jurisdiction. Confirm the specific deadlines and requirements that apply to your shipment with your carrier, insurer or P&I correspondent before relying on any figure above.
