Container Loading and Packing for Export: Verified Weight and Packing-List Checks

Scope: sea containers only

This handbook covers packed containers shipped by sea. The SOLAS verified gross mass (VGM) material does not apply to air freight, road or rail in the same terms. For an export team, the control point is the gross mass of the packed container: it must be verified, and the party responsible must be identified. A factory's role in packing does not, by itself, make that factory the shipper under the VGM regime.

Why the declared gross mass has to be right

The IMO says a discrepancy between the declared gross mass and the actual gross mass of a packed container can have effects beyond paperwork. If it goes unnoticed, it can adversely affect the safety of the ship, seafarers and shore-side workers by leading to incorrect vessel stowage decisions. The IMO identifies collapsed container stacks or loss of containers overboard as potential consequences. This is a safety and legal issue, not only a paperwork issue.

SOLAS regulation VI/2, amended by resolution MSC.380(94), makes verification of a packed container's gross mass mandatory. IMO Guidelines MSC.1/Circ.1475 provide the detailed guidance. The shipper must verify the gross mass before vessel loading. A declared figure that does not reflect the actual packed load can therefore provide the wrong basis for the stowage plan.

Identify the shipper before assigning the duty

Under the Guidelines, the shipper is a legal entity or person named as shipper on a bill of lading or sea waybill, or an equivalent multimodal transport document, and/or a party that concluded a contract of carriage with a shipping company. The contract may be concluded by that party, in that party's name or on that party's behalf.

The factory and the carrier may not be the same party. The regime does not define the shipper simply as the factory or the carrier. Check the actual carriage documents and contract, then assign the VGM duty explicitly to the party that meets the definition. Do not leave the word “shipper” as an assumption. Whatever packing work the supplier does, the shipper remains the party responsible under the regime.

What must reach the master and terminal

The IMO identifies two main requirements. The shipper is responsible for providing the verified weight by stating it in the shipping document and submitting it to the master or the master's representative and to the terminal representative sufficiently in advance to be used in preparing the ship stowage plan. The verified gross mass is a condition for loading a packed container onto a ship.

Availability to both the terminal representative and the master or the master's representative, sufficiently in advance for that purpose, is a prerequisite for loading under the SOLAS regime. It does not create an entitlement to load. The master retains ultimate discretion about whether to accept the packed container.

If the verified gross mass reaches either recipient too late to be used in the stowage plan, the stated prerequisite has not been met. The IMO also describes a contingency for a container received without a verified gross mass: the master or the master's representative and the terminal representative may obtain it on the shipper's behalf by weighing the packed container at the terminal or elsewhere. Whether and how to do this, and the apportionment of costs, should be agreed between the commercial parties. This contingency does not remove the shipper's responsibility for obtaining and documenting the verified gross mass.

Verify the gross mass

The IMO gives two methods. Weigh the packed container itself; or weigh all packages and cargo items, including the mass of pallets, dunnage and other securing material to be packed in the container, and add the tare mass of the container to the sum of the single masses.

For the package-and-cargo method, the calculation must use a certified method approved by the competent authority of the State in which packing of the container was completed. Record which method produced the figure and keep the entries tied to the actual packed load.

Use the packing list as a control record

An ITA export packing list is considerably more detailed than a standard domestic packing list. It lists seller, buyer, shipper, invoice number, date of shipment, mode of transport and carrier, and itemises quantity, description, package type, number of packages, total net and gross weight in kilograms, package marks and dimensions, if appropriate.

At the loading end, state the appropriate gross and net shipping weight, with total net and gross weight shown in kilograms on the export packing list. The supplier controls the packing information that supports the check: package type, number of packages, marks and dimensions, together with the weight record. If the package-and-cargo method is used, check the packing-list entries against the packages and cargo items that make up the sum. Do not let the net figure stand in for the gross figure; in that method, the container tare is included.

U.S. and foreign customs officials may use the packing list to check the cargo, and the commercial invoice should reflect the information shown on it. A packing list may serve as a conforming document, but it is not a substitute for a commercial invoice.

Why the pro forma invoice matters

The U.S. Commercial Service explains that pro forma invoices are models that the buyer uses when applying for an import licence, opening a letter of credit or arranging funds. The related quotation guidance expects appropriate gross and net shipping weight among the shipment details. When preparing a pro forma invoice, carry the checked weight information into the model and keep it consistent with the packing list and commercial invoice. The document matters at this stage because it gives the buyer a model for those stated uses.

Sources and use boundary

This article relies on IMO guidance on verification of the gross mass of a packed container, ITA guidance on common export documents, and U.S. Commercial Service guidance on quotations and pro forma invoices. It applies to packed containers shipped by sea. It does not establish a maximum payload, container capacity, stacking-height limit, weight-distribution method or loading technique, or an equivalent VGM rule for air, road or rail. It does not establish that a master will accept a container, that customs will clear a shipment or that a buyer will place an order.