What Do Booking, S/O, CY Cut-off, Customs Cut-off, VGM Cut-off, and ETD/ETA Mean?

Key Operational Terms

Booking: Requesting space from the shipping line; just like booking a flight, it initiates the entire transport process.

Space Release / S/O: The confirmation document issued by the carrier after approving the booking, detailing the empty container pickup location, vessel name and voyage, CY and customs cut-off times, and other critical information.

Container Pickup: Using the S/O to collect an empty container from the designated depot; Stuffing: Loading and sealing the container at the factory; Container Return: Delivering the laden container to the terminal or designated yard.

CY Cut-off (Container Yard Cut-off): The deadline by which the terminal stops receiving laden containers; Customs Cut-off: The deadline by which customs must grant export release—even if the container has already entered the port, it cannot be loaded without customs clearance.

VGM Cut-off: The deadline for submitting the Verified Gross Mass. Under the SOLAS Convention, no container may be loaded aboard a vessel without a valid VGM.

ETD: Estimated Time of Departure; ETA: Estimated Time of Arrival.

Deadline Discipline

Upon receiving the booking confirmation, immediately record all cut-off dates—CY, VGM, SI, and customs clearance—in your calendar, and build in internal lead times: complete the Shipping Instruction (SI) at least 12–24 hours ahead, submit the VGM at least 6–12 hours ahead, and allow buffer time for trucking and terminal contingencies when planning gate-in.

Information regarding schedule changes, container shortages, revised empty pickup locations, or advanced customs cut-offs is valid only when based on the latest written notice from the carrier or freight forwarder; when evaluating carriers, price should not be the sole criterion—space reliability, charges at both origin and destination, and equipment availability are equally critical.