An ocean shipment moves through roughly a dozen hand-offs between the shipper, the NVOCC or carrier, truckers, terminals and U.S. Customs. Knowing what happens at each step, which document it produces and which deadline applies is the simplest way to stop delays, rolled cargo and invoice disputes before they start.
It helps to see an ocean shipment as three overlapping phases. The commercial phase agrees on price and space. The physical and documentary phase moves the container and produces the bill of lading. The regulatory and financial phase reports the cargo to governments, gets it released and turns the shipment into invoices and payments.
The same facts travel through all three: shipper and consignee, commodity, weights, container numbers, ports and charges. Every time those facts are retyped, a mismatch becomes possible, and mismatches are what cause Customs holds, freight corrections and disputes. Keep that in mind as you read the steps below.
| Step | What happens | Main document or data |
|---|---|---|
| 1. Quote | Freight and accessorial charges are priced from the tariff, service contract or NRA. | Quotation |
| 2. Booking | Space is confirmed on a sailing and equipment is reserved. | Booking confirmation |
| 3. Equipment release | An empty container is dispatched to the shipper or the cargo goes to a warehouse (LCL). | Equipment interchange receipt (EIR), dock receipt |
| 4. Cargo receipt and stuffing | The container is loaded and sealed, or loose cargo is consolidated. | Dock receipt, stuffing record, seal number |
| 5. Export filing | Export information is filed and the carrier receives the filing citation. | EEI in AES, ITN |
| 6. Bill of lading | Shipping instructions become the bill of lading, which is rated and issued. | House and master bills of lading |
| 7. Loading and sailing | The container is gated in, loaded and the vessel departs. | Vessel/voyage, loading confirmation |
| 8. Import advance filing | Cargo is declared to the destination customs authority before loading. | Electronic cargo declaration, ISF (for U.S. imports) |
| 9. Arrival | The consignee is notified, and Customs releases or holds the cargo. | Arrival notice, release or hold status |
| 10. Delivery and return | Cargo is picked up or delivered and the empty container is returned. | Delivery order, EIR |
| 11. Billing and close-out | Charges are invoiced, vendor costs matched and the shipment closed. | Invoices, payables, profit per shipment |
A shipment usually begins with a quotation. For an NVOCC the price must come from a published tariff or a valid NVOCC Negotiated Rate Arrangement; 46 CFR 532.5 requires an NRA to be agreed to by both shipper and NVOCC before the NVOCC receives the cargo. Getting this right at the start prevents a pricing argument at the end.
The booking turns the quote into a reservation: a sailing, an equipment type and count, a cutoff date and a pickup location. Two checks matter here. First, is the equipment actually available where the shipper needs it? Second, is the cargo special in any way (hazardous, oversized, refrigerated) that needs approvals or extra documents before the carrier will accept it?
When the quotation and booking live in the same system, the booking inherits the rates and parties instead of re-entering them. In GDZ-ISIS, for example, a quotation converts to a booking and equipment availability is checked as the booking is made.
For full-container loads, the carrier or NVOCC releases an empty container to a trucker, recorded on an equipment interchange receipt. The shipper loads and seals it, and the loaded container is returned to the terminal before the cargo cutoff. For less-than-container loads, cargo is delivered to a consolidation warehouse, received on a dock receipt and later stuffed into a container with other shipments.
Meanwhile the shipper sends shipping instructions: parties, cargo description, marks, piece counts, weights and container and seal numbers. These become the bill of lading. An NVOCC issues its own house bill to the shipper and receives a master bill from the ocean carrier; the two must agree on the containers and cargo they describe. Our guide to house vs master bills of lading explains how they relate.
The bill of lading is also where the shipment is rated. Comparing the rated bill against the original quote before it is released catches most pricing mistakes while they are still easy to fix.
Government filings are where deadlines are least forgiving. The rules below are summarized from the regulation text; confirm your specific obligations with your customs broker or counsel.
For vessel cargo, 15 CFR 30.4 requires the U.S. principal party in interest (USPPI) or its authorized agent to file the Electronic Export Information and provide the filing citation or exemption legend to the exporting carrier twenty-four hours prior to loading cargo on the vessel at the U.S. port where it is laden, unless the USPPI is approved for postdeparture filing and the shipment qualifies. The carrier should not load without it. See our AES and EEI filing guide for more.
Because these filings are built from booking and bill of lading data, they inherit any error made earlier. A wrong consignee or vague cargo description on the bill of lading becomes a wrong manifest record.
As the vessel approaches, the consignee or notify party receives an arrival notice with the expected date, charges due and pickup details. Customs then releases the cargo or places a hold; a hold must be resolved before the container can leave the terminal. Cargo moving inland before entry travels in-bond, and unclaimed cargo can end up in General Order, so tracking status per shipment matters.
After release, the consignee or its trucker picks up the container and returns the empty. This is where free time and demurrage and detention come in. The FMC's billing rules in 46 CFR part 541 require demurrage and detention invoices to show, among other things, free time start and end dates and, for imports, the container availability date, so accurate event dates are not optional.
The shipment is not finished until it is billed and its costs are matched. Prepaid charges are invoiced at origin, collect charges at destination, and vendor invoices from the ocean carrier, truckers and terminals are matched against the shipment. Once revenue and costs agree, the shipment can be closed and its margin reported by customer, lane and voyage.
Integrated systems post the charges from the bill of lading straight to receivables and payables, so the accounting reflects exactly what was shipped and rated. If you file manifests yourself, look for the same principle on the Customs side: our page on ACE manifest filing software explains filing directly from the bills of lading already in the system.
Quote, booking, equipment release, cargo receipt and stuffing, export filing, bill of lading, loading and sailing, advance import filing, arrival and Customs release, delivery and empty return, and finally billing and close-out. The exact order of the filing steps varies by lane.
For vessel cargo, 15 CFR 30.4 requires the USPPI or authorized agent to file the EEI and give the filing citation or exemption legend to the exporting carrier 24 hours before the cargo is loaded at the U.S. port, unless approved postdeparture filing applies.
Under 19 CFR 4.7(b)(2), CBP must receive the electronic cargo declaration 24 hours before the cargo is laden aboard the vessel at the foreign port. NVOCCs can file their own or provide the information to the vessel carrier to file.
The ISF importer, as defined in 19 CFR 149.1, or its authorized agent. Most elements are due 24 hours before lading at the foreign port; the stuffing location and consolidator are due no later than 24 hours before U.S. arrival.
Common causes include missing or late filings, data that does not match between the house and master bills or the ISF, and Customs examinations. Clean, consistent data entered once and reused across documents reduces the risk.