Home / Blog / Industry Guide / Air Freight vs Sea Freight
Freight Forwarding Glossary: 50 Terms Every Shipper Should Know
📅 November 4, 2025 ⏱️ 8 min read ✍️ Mercury Team
📅 November 4, 2025
⏱️ 8 min read
✍️ Mercury Team
International shipping involves complex terminology that can confuse even experienced professionals. This comprehensive glossary demystifies 50 essential freight forwarding terms, helping you communicate confidently with carriers, customs officials, and logistics partners.
💡 How to Use This Glossary
Use the alphabet navigation above to jump to specific letters, or use the search box to find terms quickly. Each term includes a clear definition, practical context, and real-world examples to help you understand when and how to use it.
A
Terms starting with A
Air Waybill
A document issued by an airline that serves as a receipt for goods and evidence of the air transport contract. Unlike a bill of lading, an AWB is non-negotiable and cannot be transferred to another party
Arrival Notice
A notification sent by the carrier or freight forwarder informing the consignee that their shipment has arrived at the destination port or terminal. The notice typically includes details about pickup procedures, storage deadlines, and applicable charges.
ATA Carnet
An international customs document that allows temporary importation of goods without paying duties or taxes. Commonly used for trade show exhibits, professional equipment, and commercial samples that will be re-exported.
B
Terms starting with B
Bill of Lading
(B/L)
A legal document issued by a carrier to a shipper that details the type, quantity, and destination of goods being carried. It serves three purposes: receipt of cargo, contract of carriage, and document of title.
Bonded Warehouse
A secured warehouse where imported goods can be stored without paying customs duties until they are withdrawn for consumption or re-exported. This allows businesses to defer duty payments or avoid them entirely for goods in transit.
C
Terms starting with C
Cargo Insurance
Insurance coverage that protects goods during transportation against loss, damage, or theft. Coverage can be arranged on a per-shipment basis or through an open policy for regular shippers.
Certificate of Origin
(CO)
A document certifying the country where goods were manufactured. Required by customs authorities to determine applicable duties and whether goods qualify for preferential trade agreements.
Consolidation
The process of combining multiple smaller shipments from different shippers into one container or vehicle for cost efficiency. Consolidated shipments are then separated at destination for individual delivery.
Container
(Standard sizes: 20′, 40′, 40′ HC)
A standardized metal box used to transport goods by sea, rail, or truck. Common types include dry containers (general cargo), reefers (refrigerated), flat racks (oversized cargo), and open tops (tall cargo).
CFS
(Container Freight Station)
A warehouse facility where LCL cargo is consolidated into containers (stuffing) or removed from containers (de-stuffing). CFS serves as the point where individual shipments are combined or separated.
Customs Broker
A licensed professional who assists importers and exporters in meeting customs requirements. Brokers prepare documentation, calculate duties, and ensure regulatory compliance on behalf of clients.
Customs Duty
A tax imposed by governments on imported (and sometimes exported) goods. Duty rates vary based on product classification (HS code), country of origin, and applicable trade agreements.
D
Terms starting with D
Demurrage
A charge imposed by carriers when containers are not picked up from the terminal within the allotted free time. Daily demurrage fees escalate quickly and can become expensive if ignored.
Detention
A charge for keeping a carrier’s container beyond the allowed free time after it has been removed from the terminal. Unlike demurrage (at port), detention applies when the container is at your facility.
Dimensional Weight
(DIM Weight or Volumetric Weight)
A pricing technique for lightweight but bulky shipments, calculated by multiplying length × width × height and dividing by a dimensional factor (typically 5000-6000 for air freight). Carriers charge based on whichever is greater: actual weight or dimensional weight.
Drayage
Short-distance transportation of shipping containers, typically from port or rail terminal to warehouse. Drayage is a critical link in intermodal transportation and a frequent source of delays during congestion.
Door-to-Door
A comprehensive shipping service where the freight forwarder handles the entire transportation from the shipper’s location to the final delivery address, including all intermediate handling, customs clearance, and documentation.
E
Terms starting with E
Ex Works
(EXW – Incoterm)
An Incoterm where the seller makes goods available at their premises and the buyer assumes all transportation costs and risks from that point. The seller’s only responsibility is packaging the goods.
F
Terms starting with F
Full Container Load
(FCL)
A shipment that fills an entire container for a single shipper. FCL offers faster transit, reduced handling, lower damage risk, and often lower per-unit costs for sufficient volume compared to LCL.
Free On Board
(FOB – Incoterm)
An Incoterm for sea freight under which the seller delivers the goods on board the vessel at the named port of shipment. Risk and cost transfer to the buyer once the goods pass the ship’s rail.
Forwarder’s Cargo Receipt
(FCR)
A document issued by a freight forwarder acknowledging receipt of goods for shipment. Unlike a bill of lading, an FCR is not a document of title and cannot be used to transfer ownership.
Freight Forwarder
A company that organizes shipments on behalf of clients, coordinating with carriers, customs brokers, and other logistics providers. Forwarders don’t own transportation assets but leverage relationships and expertise to optimize shipping.
G
Terms starting with G
Gross Weight
The total weight of cargo including all packaging materials, pallets, and containers. Customs authorities and carriers use gross weight to calculate charges and verify shipment compliance
H
Terms starting with H
Harmonized System Code
HS Code
A standardized 6-10 digit product classification system used worldwide for customs purposes. HS codes determine applicable duty rates, import restrictions, and statistical tracking.
House Bill of Lading
(House B/L or HBL)
A bill of lading issued by a freight forwarder to their customer. The house B/L references the master B/L issued by the ocean carrier, creating a contractual relationship between forwarder and shipper
I
Terms starting with I
Incoterms
(International Commercial Terms)
A set of 11 internationally recognized trade terms published by the ICC that define responsibilities, costs, and risks between buyers and sellers in international transactions.
Import License
Government authorization required to import certain controlled or restricted products. Import licenses ensure compliance with trade regulations, quotas, and safety standards.
J
Terms starting with J
Just-in-Time
(JIT)
An inventory management strategy where goods arrive exactly when needed for production or sale, minimizing storage costs. JIT requires reliable shipping and precise timing
K
Terms starting with K
Knock Down
Products shipped disassembled or unassembled to reduce shipping volume and costs. Furniture, machinery, and vehicles are commonly shipped KD, then assembled at destination.
L
Terms starting with L
Less than Container Load
(LCL)
A shipment too small to fill an entire container, consolidated with other shippers’ cargo. LCL is cost-effective for small volumes but involves longer transit times and more handling.
Letter of Credit
(L/C)
A bank-issued guarantee of payment to the seller, provided specific documentary requirements are met. Letters of credit reduce payment risk in international transactions.
M
Terms starting with M
Master Bill of Lading
(Master B/L or MBL)
The bill of lading issued by the ocean carrier to the freight forwarder for consolidated shipments. The master B/L covers the entire container, while house B/Ls are issued to individual shippers.
Multimodal Transport
Shipment using two or more modes of transportation (sea, air, rail, truck) under a single contract and through bill of lading. One carrier assumes responsibility for the entire journey
N
Terms starting with N
Non-Vessel Operating Common Carrier
(NVOCC)
A freight forwarder that consolidates and transports cargo without owning vessels. NVOCCs issue their own bills of lading, assume carrier liability, and operate under different regulations than traditional freight forwarders.
O
Terms starting with O
P
Terms starting with P
Packing List
A detailed document listing the contents of each package in a shipment, including quantities, weights, dimensions, and marks. Essential for customs clearance, allowing officials to verify shipment contents without opening every box
Palletization
The process of placing goods on pallets for easier handling with forklifts and pallet jacks. Proper palletization reduces damage, speeds loading/unloading, and maximizes space utilization.
Port of Discharge
(POD)
The port where cargo is unloaded from the vessel. This may differ from the final destination if inland transportation follows sea freight. Customs clearance typically occurs at the port of discharge.
Proforma Invoice
A preliminary invoice sent before shipment to declare the value and nature of goods, often required for customs clearance, letters of credit, or advance payment. Unlike a commercial invoice, it’s not a demand for payment.
Q
Terms starting with Q
Quarantine
Official detention of cargo for inspection to prevent introduction of pests, diseases, or prohibited materials. Agricultural products, wood packaging, and animal products frequently require quarantine inspection
R
Terms starting with R
Reefer Container
(Refrigerated Container)
A temperature-controlled shipping container equipped with refrigeration units, used for perishable goods requiring specific temperature maintenance. Available in various sizes with temperature ranges from -30°C to +30°C
Roll-on/Roll-off
(RoRo)
Vessels designed to carry wheeled cargo (cars, trucks, trailers) that drive on and off the ship under their own power. RoRo shipping is faster than container loading for vehicles but offers less protection.
S
Terms starting with S
Seal Number
A unique identifier for the security seal placed on containers after loading. Customs and carriers check seal numbers to verify containers haven’t been opened during transit. Broken seals require investigation
Shipping Instruction
(SI)
A document provided by the shipper to the freight forwarder with detailed instructions for shipment handling, including routing preferences, insurance requirements, and special handling needs.
Shipping Line
(Carrier)
A company that owns or operates ocean vessels for cargo transportation. Major lines include Maersk, MSC, CMA CGM, and COSCO. Freight forwarders book space on these carriers.
Stuffing
(Container Loading)
The process of loading cargo into a container. Proper stuffing techniques maximize space utilization, prevent damage, and ensure weight distribution complies with regulations
T
Terms starting with T
Tariff
A tax imposed on imported goods, also known as customs duty. Tariff rates vary by product classification, origin country, and applicable trade agreements.
Twenty-foot Equivalent Unit
(TEU)
A standard unit for measuring container shipping volume and vessel capacity. One TEU equals one 20-foot container. A 40-foot container equals 2 TEU.
Third-Party Logistics
(3PL)
Outsourced logistics services including transportation, warehousing, distribution, and inventory management. 3PL providers allow businesses to focus on core operations
Transshipment
Transfer of cargo from one vessel to another at an intermediate port before reaching the final destination. Transshipment routes may be cheaper but add time and handling risk.
U
Terms starting with U
V
Terms starting with V
Value-Added Services
Additional logistics services beyond basic transportation, including kitting, labeling, quality inspection, repacking, light assembly, and distribution.
Vessel Schedule
(Sailing Schedule)
The timetable showing vessel departure and arrival dates, port calls, and transit times. Schedules vary by season, with more frequent sailings on major trade lanes
W
Terms starting with W
Warehouse Receipt
A document issued by a warehouse operator acknowledging receipt and storage of goods. In some cases, warehouse receipts can be negotiable documents representing title to stored goods.
X
Terms starting with X
X-Ray Inspection
Non-intrusive container scanning used by customs authorities to verify contents without physically opening containers. X-ray inspection speeds clearance for compliant shipments.
Y
Terms starting with Y
Z
Terms starting with Z
📚 Bookmark This Resource
This glossary covers the essential freight forwarding terms, but international logistics involves hundreds of specialized terms. Bookmark this page for quick reference when reviewing shipping documents, communicating with forwarders, or negotiating contracts.
Conclusion: Building Your Logistics Vocabulary
Understanding freight forwarding terminology transforms you from a passive shipper into an informed partner in your supply chain. This knowledge enables productive conversations with logistics providers, helps you identify potential issues in contracts, and allows you to make better decisions about shipping methods and service providers.
Key Recommendations:
- Keep this glossary accessible for reference during shipping transactions
- Ask your freight forwarder to clarify unfamiliar terms immediately
- Review your shipping documents systematically to understand each charge
- Learn the specific terminology relevant to your trade lanes and products
- Stay current with industry changes—new terms emerge as logistics evolves
- Don’t hesitate to request detailed explanations from your service providers
Professional freight forwarders appreciate knowledgeable clients who understand logistics terminology. This shared language foundation enables more efficient communication, reduces misunderstandings, and helps both parties work together effectively toward successful shipments.
🌐 Regional Expertise
Mercury International specializes in Indochina logistics across Thailand, Vietnam, Cambodia, Laos, Myanmar, and Nepal. Our local knowledge extends beyond general freight forwarding terminology to include region-specific regulations, customs practices, and business customs that impact your operations.