How Ocean Freight Works for Small Shippers and Truckers

Who actually moves your container, who is licensed to sell you the space, what the boxes really hold, and the paperwork sequence that decides when a trucker can pick up.

Last reviewed: October 11, 2026 Reading time: 7 min
40-foot high cube container on a truck chassis
Photo: Col André Kritzinger via Wikimedia Commons (CC BY-SA 3.0)

The four parties you deal with

An ocean shipment looks simple from the outside: a box goes on a ship and comes off in another country. In practice at least four different businesses touch it, and the one you pay is often not the one that owns the ship. Knowing who is who tells you who issues the bill of lading, who bills demurrage, and who you call when the box is not released.

PartyWhat it doesRegulated by
Ocean common carrierOperates the vessels (the shipping line). Issues the master bill of lading.Federal Maritime Commission (FMC)
NVOCC (non-vessel-operating common carrier)Buys space from carriers and resells it under its own bill of lading. Acts as the carrier to you and as the shipper to the vessel line.FMC license or registration plus bond
Ocean freight forwarderBooks space and prepares export documents on the shipper's behalf. Does not issue its own carrier bill of lading in that role.FMC license plus bond
Marine terminal operatorRuns the container yard where boxes are loaded, stacked and handed to truckers.FMC (schedules and practices); Coast Guard for security

The legal definitions are in 46 U.S.C. 40102. An ocean freight forwarder is a person in the United States that dispatches shipments via a common carrier and books or arranges space on behalf of shippers. An NVOCC is a common carrier that does not operate the vessels and is a shipper in its relationship with an ocean common carrier. Together, forwarders and NVOCCs are called ocean transportation intermediaries (OTIs).

Around these sit a customs broker (who files the import entry), the drayage carrier (who moves the box between the terminal and a warehouse), and on LCL shipments a container freight station where boxes are stuffed or stripped.

FMC licensing and bonds: what to check before you hand over cargo

A US-based company acting as an NVOCC or ocean freight forwarder must hold an FMC license. The FMC requires a qualifying individual with at least three years of OTI experience, and every OTI must post proof of financial responsibility, almost always a surety bond. The amounts are set in 46 CFR 515.21:

OTI typeBond (financial responsibility)
Ocean freight forwarder (US)$50,000
NVOCC (US-based)$75,000
Licensed non-US NVOCC (with US branch)$75,000
Registered (unlicensed) non-US NVOCC$150,000
Group or association bondLesser of the members' combined amounts or $3,000,000

The bond is not insurance for your cargo. Under 46 CFR 515.23 it is available to pay claims arising from the OTI's transportation-related activities. If the OTI does not respond to a claim notice within 45 days, the surety can pay a claim it finds valid; if there is no agreement within 90 days, the bond is available to pay a final court judgment or FMC reparations order. With a $75,000 bond shared among every claimant, a failed NVOCC may not cover everyone in full.

Before you book with an unfamiliar company, look it up on the FMC's OTI list at www2.fmc.gov/oti. A US company selling ocean transportation without a license is a red flag.

FCL vs LCL

FCL (full container load)LCL (less than container load)
Who uses the boxOne shipper, one consigneeSeveral shippers share one box
Who sells itCarrier or NVOCCAlmost always an NVOCC (consolidator)
PricingPer containerPer cubic meter or weight, plus origin and destination handling
Extra handlingSealed at origin, opened at destinationStuffed at an origin freight station, stripped at a destination freight station
US pickupContainer on a chassis from the marine terminal (drayage)Loose freight from a container freight station, often with a dry van or box truck
Typical riskDemurrage and detention if pickup or return is lateDelays waiting for the consolidated box to be stripped; storage charges at the station

For a trucker, the difference is practical. An FCL import is a terminal pickup that needs a chassis, a gate appointment and usually a TWIC. An LCL import is a dock pickup at a warehouse that is closer to ordinary LTL work.

Container sizes and real payloads

Exact dimensions and weights differ slightly by manufacturer and by individual box. The figures below are the published specifications of one major carrier, Ocean Network Express. Always check the CSC plate on the container door for that box's actual tare and maximum gross.

Spec20' dry40' dry40' high cube
Inside length19'4" (5,898 mm)39'6" (12,032 mm)39'6" (12,032 mm)
Inside width7'8" (2,350 mm)7'8" (2,350 mm)7'8" (2,350 mm)
Inside height7'10" (2,390 mm)7'10" (2,390 mm)8'10" (2,695 mm)
Door opening (W x H)7'8" x 7'6"7'8" x 7'6"7'8" x 8'6"
Capacity1,169 cu ft (33.1 m³)2,387 cu ft (67.6 m³)2,690 cu ft (76.2 m³)
Tare4,740 lb8,027 lb8,157 lb
Max payload62,460 lb59,172 lb63,493 lb

Why the payload number misleads US shippers

Container ratings are international. US highway limits are not. A 20-footer loaded to its 62,460 lb rating weighs about 67,200 lb with the box alone. Under an 80,000 lb gross limit that leaves roughly 12,800 lb for the tractor, chassis, fuel and driver, which is far less than they weigh. Heavy, dense cargo such as tile, paper or metal routinely runs into this. The legal cargo weight depends on the tractor, the chassis and the axle spacing; see weight limits before quoting or accepting a heavy box. Overweight boxes need a permit, a tri-axle chassis or a transload.

The import document flow, step by step

  1. Booking. The shipper or its forwarder books space with a carrier or NVOCC.
  2. Importer Security Filing (ISF). For ocean imports, the ISF importer must transmit the required data to CBP no later than 24 hours before the cargo is loaded on the vessel at the foreign port (19 CFR 149.2). The data is filed at the lowest bill of lading level, which is the house bill where one exists.
  3. Bill of lading. Issued once the cargo is received or loaded. See ocean bills of lading.
  4. Arrival notice. The carrier or NVOCC tells the consignee or notify party the vessel's estimated arrival and the charges due.
  5. Customs entry. Usually filed by a licensed customs broker. CBP must release the cargo.
  6. Freight release. The carrier releases the cargo once freight is paid and the original bill of lading is surrendered or an express release is in place.
  7. Terminal availability. The box is discharged, has no holds, and the terminal shows it available. Free time starts according to the carrier's tariff or contract.
  8. Pickup. The drayage carrier books an appointment where required and pulls the box. See drayage and TWIC.
  9. Empty return. The empty goes back to the location the carrier names. Late returns trigger detention; see demurrage and detention.

What makes up transit time

Port-to-port sailing time is published in each carrier's schedule. The number that matters to a shipper is longer: export cargo cutoff before the vessel sails, the voyage itself, any transshipment at an intermediate port, discharge and terminal dwell, customs clearance, and the drayage leg. Delays usually happen at the edges, not at sea: a missed cutoff rolls the cargo to the next sailing, and a hold at the destination terminal eats into free time. Build the plan around the carrier's published cutoff and the free time in your contract, not around the vessel's arrival date.

Common mistakes

  • Not checking the license. Booking with an unlicensed "forwarder" leaves you without the FMC bond if something goes wrong.
  • Quoting a heavy 20-footer at full container payload. The box can carry it; the US truck often cannot.
  • Treating the vessel ETA as the pickup date. Customs release, freight release and terminal availability all have to line up first.
  • Comparing ocean rates instead of landed cost. Destination handling, station fees, drayage, chassis and free time often decide which quote is cheaper.
  • Late ISF. The filing deadline is tied to loading at the foreign port, not to arrival in the US.

Questions

Is an NVOCC the same thing as a freight forwarder?

No. Under 46 U.S.C. 40102 an NVOCC is a common carrier that issues its own bill of lading and contracts with the vessel operator as a shipper. An ocean freight forwarder books space and handles documents on the shipper's behalf but does not act as the carrier. Many companies hold an FMC license for both roles, so check which role they play on your shipment.

How much bond does an NVOCC need to operate in the US?

Under 46 CFR 515.21 a US-based NVOCC needs $75,000 in financial responsibility, an ocean freight forwarder $50,000, and an unlicensed foreign NVOCC that registers with the FMC $150,000. A licensed foreign NVOCC with a US branch also posts $75,000.

Can a 20-foot container loaded to its maximum payload go on US highways?

Usually not without a permit. A 20-foot dry box can be rated for over 60,000 lb of cargo, but once you add the container tare, chassis and tractor the combination would exceed the 80,000 lb federal gross limit. The legal cargo weight depends on your equipment, so weigh it out before you accept the load.

When should I use LCL instead of FCL?

LCL makes sense when your cargo fills only a small part of a container. Once you are paying for a large share of a box, a full container is often simpler because it avoids the consolidation and deconsolidation steps and extra handling. Compare all-in door-to-door quotes, not just the ocean rate.

Sources

  1. 46 CFR 515.21 — Financial responsibility requirements — eCFR.
  2. Apply for a License or Request a Foreign Registration — Federal Maritime Commission.
  3. 46 U.S.C. 40102 — Definitions (Shipping Act) — Office of the Law Revision Counsel.
  4. 19 CFR Part 149 — Importer Security Filing — eCFR.
  5. Dry Containers — specifications — Ocean Network Express (ONE).

General information, not legal, tax or financial advice. Regulations change; confirm current requirements with the agency before acting.