Containers Lost at Sea 2026: Why Losses Rose 157%

What the 2026 report actually shows

The World Shipping Council estimates that 1,478 containers were lost at sea in 2025, compared with 576 in 2024 and 221 in 2023. That is a sharp annual increase of about 157%. It also sits above the recent three-year average, reversing two years of unusually low reported losses.

The denominator matters. Carriers transported roughly 280 million containers during 2025, so the estimated loss rate was around 0.0005%. In other words, virtually every container completed its ocean movement without being lost overboard. The report does not show a broad failure of container shipping. It shows how a small number of severe incidents can move the annual total quickly.

The data is based on direct reporting from World Shipping Council members representing about 90% of global container-vessel capacity. The council extrapolates an industry-wide estimate for the remaining capacity. This makes it the best established annual measure available, but it is still an estimate rather than a count taken directly from every ship and flag state.

One incident shaped almost half the annual total

A single major vessel incident accounted for 640 containers, approximately 43% of all containers lost during the year. That concentration explains why annual figures can swing so widely. A year with one major casualty can look far worse than a year with similar day-to-day operating standards but no comparable event.

The report identifies extreme weather and ocean conditions, particularly in the North Atlantic and North Pacific, along with fire-related incidents, as leading contributors. Heavy rolling can place enormous forces on container stacks and securing equipment. Fire can weaken structures, force emergency action or contribute to the loss of cargo during a casualty.

This is why a container-overboard event cannot be reduced to one cause. The final loss may involve weather, route decisions, vessel motion, stack position, lashing equipment, structural limits, container condition, declared weight and how the cargo was packed. An investigation has to separate the initiating event from the conditions that allowed containers to move or fall.

Recovery improved even as losses increased

The report recorded 128 recovered containers, the highest recovery figure since the World Shipping Council began collecting recovery data in 2023. Recovery matters because a floating or partly submerged container can remain a hazard to nearby vessels. A recovered container can also limit environmental damage and preserve evidence for cargo, insurance and safety investigations.

Recovery does not mean the goods inside are commercially usable. Salt water, impact, prolonged immersion and damaged packaging can make cargo a total loss even when the box is found. Cargo owners should treat recovery status, cargo condition and claim status as separate questions.

Lost-container reporting became mandatory in 2026

A major regulatory change took effect on 1 January 2026. Amendments to the SOLAS and MARPOL conventions now require the master of a ship involved in losing freight containers to report the incident without delay. The report goes to ships in the vicinity, the nearest coastal state and the vessel's flag state. The flag state must then report the loss to the International Maritime Organization.

The reporting requirements cover lost containers and containers observed drifting at sea. Information includes the position and number of containers, where available, along with other details required for a danger message. The immediate purpose is navigational safety: another vessel needs to know where an obstruction may be before it enters the area.

For cargo owners, mandatory reporting should improve the consistency of the official record. It does not guarantee that a shipper receives an instant container-level message. The operational report moves through the master, coastal and flag authorities, while commercial communication normally comes through the carrier, forwarder or cargo insurer. Those channels may move at different speeds during an emergency.

What shippers can control before loading

A cargo owner cannot control the weather, vessel route or onboard lashing plan. You can control the information and condition of the cargo handed to the carrier. Those inputs matter because the ship's stowage plan and securing calculations depend on accurate weight, cargo type and container condition.

• Provide an accurate verified gross mass. SOLAS requires the verified gross mass of a packed container before loading. An incorrect weight can undermine stowage and stack calculations.
• Pack weight evenly. Concentrated or shifting cargo can damage the container and create unsafe forces. Use suitable blocking, bracing and dunnage for the commodity.
• Declare dangerous goods correctly. Give the correct classification, quantity, packaging and documentation. Undeclared or misdeclared cargo can increase fire risk and delay emergency response.
• Inspect the equipment. Check the doors, floor, corner posts, roof, walls and locking components before packing. Record existing damage with dated photographs.
• Stay within payload limits. The container's maximum gross weight and the road, rail and terminal limits all apply. Space remaining inside a box is not permission to exceed its safe weight.
• Keep the packing record. Retain the packing list, VGM evidence, seal number, photographs and handover documents with the booking file.

A loading calculator can help with space planning, but it does not certify cargo securing, structural safety or verified gross mass. Heavy, hazardous, liquid, irregular or high-value cargo may require a qualified packing or engineering review. Use planning software as one input, not as a replacement for the CTU Code, legal requirements or professional judgement.

Insurance needs to match the actual risk

The carrier's liability is not the same as the commercial value of your goods. Liability can be limited by the transport contract and applicable convention, and disputes may involve whether the carrier exercised due care. Cargo insurance is the practical way to protect the invoice value and other insured costs, subject to the policy terms.

Before shipping, confirm the insured value, covered voyage, exclusions, deductible and claim-notification deadline. Check whether the policy addresses general average and salvage expenses. A marine casualty can create financial obligations even when your own container is not physically lost, especially if extraordinary costs are incurred to save the vessel and remaining cargo.

High-value or sensitive cargo deserves a documented decision rather than an assumption that the forwarder arranged cover. Ask for the policy or certificate and identify who must notify the insurer. Waiting until after an incident to discover that cover was optional is an expensive mistake.

What to do if your vessel reports containers overboard

A report that a vessel lost containers does not prove that your box was one of them. Avoid declaring a total loss until the carrier confirms the affected container numbers. At the same time, do not wait passively if your cargo may be involved.

• Confirm the incident through the carrier. Ask whether your container number appears on the affected list and request written status.
• Notify the insurer or broker promptly. Follow the policy's notice requirements even if the final loss status is not yet known.
• Preserve every document. Keep the bill of lading, commercial invoice, packing list, VGM record, seal details, photographs and carrier messages.
• Track the reference for later updates. Watch for changed status, discharge information, recovery notices or a revised arrival, but treat silence as unknown rather than proof of safety.
• Protect the downstream plan. Warn the consignee, production team and customer that the shipment is under review. Start checking replacement stock and transport options where the business impact justifies it.
• Record costs separately. Additional freight, inspection, disposal, storage and replacement costs may need their own evidence during a claim.

What container tracking can and cannot tell you

Container tracking is useful during an incident because it keeps carrier milestones, route changes and arrival updates tied to the correct reference. It can show that a box was loaded, whether a later discharge event appeared and whether the carrier changed the expected journey. A shared view also stops different teams from working from different screenshots or email chains.

Tracking cannot independently prove that a container is still physically aboard a ship. Carrier events may be delayed during a casualty, and an expected milestone is not confirmation that it occurred. If cargo may be overboard, the carrier's written confirmation, survey findings and insurer process remain authoritative. Good visibility helps you manage the response; it does not replace the investigation.

The bottom line

Container losses rose sharply to 1,478 in 2025, driven heavily by one 640-container incident, while still accounting for only about 0.0005% of global container movements. The risk is rare, but the impact on an affected shipment can be total. Accurate VGM, proper packing, honest dangerous-goods declarations, suitable insurance and organised tracking records are the parts a shipper can control. The new 2026 reporting rules should improve the official picture, but your own response still depends on clean documents and fast confirmation from the carrier and insurer.