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SHIPPING NEWS EXPLAINER · By Super Load Calculator · 8 October 2026
Mandatory reporting of freight containers lost at sea took effect on 1 January 2026 through amendments to SOLAS and MARPOL. The reporting process concerns an incident at sea; cargo teams should keep that duty distinct from their earlier planning and loading records.
Who reports a container loss?
Who reports a container loss?
IMO states that the master of the ship involved communicates the particulars to ships nearby, the nearest coastal State and the flag State. The flag State then reports the incident to IMO. See IMO's announcement of the rules effective from January 2026 for the official explanation.
The rule does not require a shipper to use a particular load-planning application. A software layout is not evidence that an incident-reporting duty has been met.
Keep each record tied to its purpose
Keep each record tied to its purpose
In an ordinary cargo handover, different records answer different questions. Confusion arises when a planning document is treated as proof of a physical check it did not perform.
Cargo list: describes the packed pieces, quantities, gross weights and handling instructions supplied for planning.
Proposed load plan: shows the arrangement and sequence to review before loading.
Dock change record: identifies differences between the proposal and what the team actually handled.
Packing and securing record: documents the physical work and checks performed by the responsible team.
Keep the references consistent across those documents. If a piece is renamed or repacked, the receiving team should still be able to identify it without tracing several conflicting lists.
Keep mass verification separate
Keep mass verification separate
The packed container's verified gross mass belongs to the applicable verification process. Entering cargo weights into a planning tool does not itself verify the sealed container's mass. Consult the IMO guidance on verified gross mass and the operator's procedures.
A practical document review before dispatch
A practical document review before dispatch
Identify the current cargo list and remove ambiguity about older versions.
Keep the actual equipment reference with the planning record.
Record changes made during packing or loading.
Make the responsible contacts and document owners clear.
Confirm that physical checks and regulatory records were completed through the appropriate processes.
These habits make a handover easier to understand. They do not establish that a shipment complies with every requirement or that cargo cannot be lost at sea.
Read the reporting rule in context
Read the reporting rule in context
The website's lost-container reporting explainer connects the news with cargo operations. For the wider packing and securing guidance, consult the IMO/ILO/UNECE CTU Code.
Cover artwork is an illustrative vessel scene, not a photograph of a container-loss incident. Check the official requirements and operator procedures relevant to the voyage.
Related reading
Related reading
Container cargo list checklist: prepare the dock handover — on our main website.
Container loading sequence: review the plan before the dock — on our main website.
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Published by Super Load Calculator, the maker of the planning tool linked in these guides.
Companion reading
Companion reading
Read the Medium explanation of the 2026 rule, use the Substack cargo-record briefing, or share our LinkedIn cargo-record checklist with your team.
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