Your first week in a shipping role and someone sends you a status update: “ATD confirmed, ETA POD revised, vessel in CY, MBL released.” You have no idea what any of it means. You do not want to ask because everyone seems to expect you to know already.
This article is for that moment. It covers every major abbreviation you will see in day-to-day shipping, what each one means, where it comes from, and what it means for your job.
ETD stands for Estimated Time of Departure. It is the date and time a vessel, aircraft, or truck is expected to leave the port or terminal of origin.
In sea freight, ETD is almost always tied to a specific sailing. Your freight forwarder will book your cargo onto a vessel with a known ETD: for example, a container ship departing Felixstowe on Thursday 3 July. That Thursday date is the ETD.
ETD matters for two reasons in your daily work. First, it tells you when your goods need to be at the port. There is a cut-off, usually 24 to 48 hours before ETD, by which your container must be at the terminal gate. Miss the cut-off and your cargo rolls to the next sailing. Second, ETD is the anchor point from which ETA is calculated. If ETD slips, ETA slips with it.
On booking confirmations and shipping instructions, you will see ETD written as a date, sometimes a specific day, sometimes just a week number (“week 28 ETD”). The more specific the better. A week-number ETD is a rough guide. A date ETD is what you can actually plan against.
ETA stands for Estimated Time of Arrival. It is the date and time the vessel is expected to reach the destination port.
ETA is the number your warehouse, customer, or supply chain manager will keep asking about. It anchors delivery planning, stock replenishment, and production schedules. When ETA changes, and it often does, the ripple effects move downstream fast.
In sea freight, ETA is usually stated as a date range or a specific date depending on how far out the vessel is. A long-haul shipment from Shanghai to Tilbury might have an ETA stated as a seven-day window early in the booking, narrowing to a single day as the vessel gets closer.
Two things to know about ETA. First, it refers to the vessel arriving at port, not your goods arriving at your door. From vessel arrival to final delivery, there is customs clearance, port handling, and haulage. That can add several days. Second, ETA is an estimate. Ports update it constantly as vessels encounter weather, congestion, or schedule changes.
ATD is Actual Time of Departure. ATA is Actual Time of Arrival. Both replace their estimated counterparts once the event has happened.
Once a vessel has physically left port, ATD is confirmed. It tells you when the ship actually sailed rather than when it was expected to. ATD is useful for calculating how long a voyage has taken and for updating ETA estimates when a vessel has departed late.
ATA is confirmed when the vessel arrives at the destination port. This is the trigger for several things to happen in sequence: port discharge, customs clearance, and release of cargo. ATA is what your customs broker needs before they can file a customs entry and request the release of your goods.
In practice, you will see ATD and ATA in shipment tracking updates rather than booking communications. They are backward-looking facts rather than forward-looking estimates.
POL is the Port of Loading: the port where your cargo is loaded onto the vessel. POD is the Port of Discharge: the port where it comes off.
These two codes appear on almost every shipping document: the booking confirmation, the bill of lading, the arrival notice. They identify the origin and destination ports of the sea leg. They are usually written as three-letter UN/LOCODE port codes. GBFXT for Felixstowe, GBSOU for Southampton, CNSGH for Shanghai.
Knowing your POL matters for cut-off planning. Knowing your POD matters for clearance planning, because customs requirements, free time allowances, and local port charges all depend on which port your goods arrive at.
In the UK, the main container discharge ports are Felixstowe, Southampton, London Gateway, and Tilbury. Each has its own haulage lead times, port charges, and customs contact points. Post-Brexit, goods arriving from the EU may face additional documentary checks at any of these ports.
Shipping schedules change constantly. A vessel that departs two days late will arrive two days late. A vessel that skips a port due to congestion may arrive at yours early or late depending on the route. Weather, port strikes, mechanical issues, and berth availability all move ETA around.
When you receive an ETA update, do three things. Check whether the new ETA falls within your agreed delivery window. Alert your warehouse or customer if the change affects planned delivery. Check with your customs broker whether the new ETA changes the timing of any import documentation.
In the UK, post-Brexit customs holds are an additional variable. Even when a vessel arrives on ETA, your goods can be held by HMRC or Border Force for documentary checks. This is separate from the shipping ETA. Do not promise a delivery date based purely on vessel ETA, always build in time for customs clearance.
If ETA slips majorly, more than a week, check whether your cargo has been rolled. Rolling means your container has been removed from the booked vessel and placed on a later sailing. This resets both ETD and ETA. Your freight forwarder should notify you, but it does not always happen automatically.
These three terms describe where cargo is handed over at the origin and destination end.
CY stands for Container Yard. A CY-to-CY shipment means the shipper delivers a full container to the origin container yard and the consignee collects it from the destination container yard. The ocean carrier’s responsibility starts and ends at the yard gate. Any haulage beyond the yard is arranged separately.
CFS stands for Container Freight Station. A CFS is a bonded warehouse where loose cargo is consolidated or de-consolidated. An LCL shipment typically goes CFS-to-CFS. The freight station consolidates multiple shippers’ cargo into one container at origin, then breaks it apart at destination.
Door means the carrier or freight forwarder arranges collection from the shipper’s premises at origin or delivery to the consignee’s premises at destination. A door-to-door service includes inland haulage at both ends. It is often the simplest option for importers who do not want to manage port collection.
In practice, your booking confirmation will state something like “CY/CY” or “Door/CY” to describe the pickup and delivery terms. Understanding this tells you who is responsible for haulage and what costs to expect beyond the ocean freight rate.
TEU stands for Twenty-foot Equivalent Unit. It is the standard unit used to measure container capacity. One TEU is one 20-foot container.
FEU stands for Forty-foot Equivalent Unit. One FEU equals two TEUs, it is a 40-foot container, the standard size for most FCL shipments.
You will encounter TEU and FEU in two main contexts. When booking, your freight forwarder will ask whether you need a 20-foot (1 TEU) or 40-foot (1 FEU) container. In market data and capacity reports, you will see phrases like “the vessel has capacity for 8,000 TEU” or “UK container imports reached 1.2 million TEU this quarter.”
Most standard containers come in two heights: standard (8’6″) and high cube (9’6″). A 40-foot high cube is written as 40’HC or 40HC. If your cargo is tall or bulky, you may need a high cube, check with your freight forwarder at the booking stage.
FCL stands for Full Container Load. Your goods are packed into a dedicated container. You pay for the whole box, whether it is full or not.
LCL stands for Less than Container Load. Your goods share a container with other shippers’ cargo. You pay for the space your cargo occupies, measured in cubic metres (CBM) or weight tonnes, whichever is greater.
FCL is usually cheaper per unit for large volumes because you avoid the consolidation and de-consolidation fees that come with LCL. It is also faster at destination, your container goes straight to customs and then to you, rather than waiting for the freight station to sort the shared box.
LCL suits smaller shipments where it would not make commercial sense to pay for a whole container. The trade-off is more handling, slightly longer transit at destination, and more exposure to damage from other cargo in the container.
In the UK, LCL cargo arriving at Felixstowe or Tilbury is de-consolidated at a CFS before release. The time this adds, typically two to five days post-vessel arrival, is worth factoring into your ETA planning and any delivery promises you make.
These three abbreviations refer to the key transport documents for different shipping modes.
B/L is the Bill of Lading: the primary document for sea freight. It serves three functions: a receipt for goods shipped, a contract of carriage between shipper and carrier, and a title document that gives the holder the right to claim the cargo. You cannot release cargo to a consignee at the destination port without the original bill of lading, or a telex release or sea waybill if that has been agreed.
AWB is the Air Waybill: the equivalent document for air freight. Unlike a bill of lading, an AWB is not a title document. It is a receipt and contract of carriage only. The consignee named on the AWB can collect goods without presenting the original document.
CMR is the road freight consignment note, named after the Convention on the Contract for the International Carriage of Goods by Road. It travels with a truck across borders. In post-Brexit UK trade, CMR notes are commonly used on road movements between Great Britain and Europe through the Channel Tunnel or ferry routes.
When a freight forwarder consolidates multiple shippers’ cargo into one container, two sets of bills of lading are created.
MBL is the Master Bill of Lading. This is issued by the ocean carrier to the freight forwarder. The MBL names the freight forwarder as the shipper and the forwarder’s destination agent as the consignee. The shipping line only recognises the MBL.
HBL is the House Bill of Lading. This is issued by the freight forwarder to each individual cargo owner. The HBL names the actual shipper and the actual consignee. It is the document you receive as an importer.
This matters in practice because when your customs broker requests the release of your goods, they need the HBL, not the MBL. The freight forwarder’s destination agent controls release on the HBL. If there is a problem with the MBL between the shipping line and the forwarder, it can block release of all HBLs under that master, even if your individual shipment is fine.
Always check whether you have received an HBL or an MBL. If you are dealing directly with a shipping line on an FCL booking, you will receive an MBL. If you are working through a freight forwarder on an LCL shipment, you will receive an HBL.
These three terms cost importers money when they are not understood. They are related but distinct.
Free time is the number of days you are allowed to collect your container from the port or return an empty container after delivery, without incurring extra charges. Free time is agreed at booking and varies by carrier, port, and trade lane. At UK ports, standard import free time is typically four to seven days from vessel arrival.
Demurrage is the charge applied when a full container sits at the port beyond the agreed free time. The clock starts when free time expires. Demurrage is charged per container per day and can escalate quickly, especially at busy UK ports during peak season. A container sitting at port during a customs hold will accumulate demurrage even if the delay is not your fault.
Detention is a separate charge for keeping an empty container beyond the agreed return deadline. Once you have unpacked your import container, you need to return it to the carrier’s depot within the agreed window. Exceed that window and detention charges apply.
In post-Brexit UK trade, customs holds at ports have become a more common cause of demurrage. Goods stopped for documentary checks or physical inspection can sit at port for several days. The carrier’s demurrage clock does not pause during a customs hold. If your goods are under a hold, contact your carrier immediately to discuss demurrage liability, some carriers will pause the clock during a hold if you notify them promptly.
Shipment tracking systems use a standard set of status terms. Here is what each one means in practice.
Departed. The vessel or vehicle has left the origin port or terminal. ETD has become ATD. The voyage is underway.
In Transit. The shipment is on its way. For sea freight, this covers the entire ocean voyage from port to port. The vessel may call at intermediate ports. Your ETA refers to the final destination port, not any interim calls.
Arrived. The vessel has reached the destination port. ATA is confirmed. This does not mean your goods are cleared, it means they are ready to be discharged from the vessel. Clearance comes next.
Customs Hold. Your goods have been flagged by HMRC or Border Force. This can be a documentary hold, a physical examination, or a risk-based selection. A customs hold pauses release of your goods until the hold is lifted. Contact your customs broker immediately, delays here feed directly into demurrage.
Released. Customs has cleared your goods. The customs entry has been accepted and duty paid or deferred. At this point, your goods can be moved from the port and delivered.
Delivered. The cargo has been physically delivered to the consignee’s address. This is the end of the shipping event. The freight invoice can now be reconciled against the confirmed delivery.
| Abbreviation | Meaning |
|---|---|
| ETD | Estimated Time of Departure — when the vessel is expected to leave the origin port |
| ETA | Estimated Time of Arrival — when the vessel is expected to reach the destination port |
| ATD | Actual Time of Departure — when the vessel actually left the origin port |
| ATA | Actual Time of Arrival — when the vessel actually reached the destination port |
| POL | Port of Loading — the port where cargo is loaded onto the vessel |
| POD | Port of Discharge — the port where cargo is unloaded from the vessel |
| CY | Container Yard — the terminal area where containers are stored and handed over |
| CFS | Container Freight Station — where LCL cargo is consolidated or de-consolidated |
| TEU | Twenty-foot Equivalent Unit — one 20-foot container |
| FEU | Forty-foot Equivalent Unit — one 40-foot container (two TEUs) |
| FCL | Full Container Load — one shipper uses the whole container |
| LCL | Less than Container Load — multiple shippers share one container |
| B/L | Bill of Lading — sea freight document: receipt, contract, and title |
| AWB | Air Waybill — air freight equivalent of a B/L (not a title document) |
| CMR | Road freight consignment note for cross-border truck movements |
| MBL | Master Bill of Lading — issued by the carrier to the freight forwarder |
| HBL | House Bill of Lading — issued by the freight forwarder to the cargo owner |
| Free time | Days allowed to collect or return a container without extra charges |
| Demurrage | Daily charge for a full container held at port beyond free time |
| Detention | Daily charge for keeping an empty container beyond the return deadline |
This article is part of a learning path — return to explore more topics.
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