Definition of Shipping Space Release:
Also known as space confirmation or allocation of space, this occurs when the shipping line reviews the booking request from the freight forwarder/shipper (covering price, sailing schedule, etc.) and officially assigns vessel space to the cargo. Note: This only confirms there is space onboard — it does not mean containers have been released yet.
Definition of Container Release:
After space is confirmed, the shipping line issues a document (commonly referred to in South China as S/O – Shipping Order) allowing the freight forwarder/shipper to pick up empty containers.
Steps: With this release document → collect empty container at depot → load cargo → return full container.
I. Shipping Space Release Process
Booking Request Submission
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By: Freight forwarder or shipper
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Content: Cargo details (commodity, weight, volume, container type/quantity), POL/POD, sailing schedule (ETD/ETA), special requirements (hazardous cargo, temperature control, etc.)
Space Confirmation
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Issued after carrier’s review, including:
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Vessel/Voyage
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B/L Number
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CY Closing date
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ETD (Estimated Time of Departure)
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Validity period for space (cargo must be loaded before this date)
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Some routes may require prepaid freight or booking deposit
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Next Steps
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Use space confirmation to apply for container release (pick-up).
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Arrange trucking, customs clearance, and stuffing.
II. Container Release Process
Container Pick-up Application
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Provide: Booking number, pick-up location, container type & quantity
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May require deposit or guarantee (commonly known as container deposit)
Issuance of Release Order / EIR
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Issued by carrier or terminal, includes:
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Container number(s)
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Vessel/Voyage
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Pick-up/Return depot
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Validity period
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Container Pick-up and Loading
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With the release order, collect empty container from depot
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Inspect and sign-off
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Deliver to factory for stuffing
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Return full container to terminal or designated yard
III. Common Questions & Quick Reference
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Is space release = container release?
No. Space release only guarantees vessel space. Container release depends on actual equipment availability. -
Can shipper assign container number/seal number?
Some carriers allow this for documentation purposes. -
Why does S/O ETD keep changing?
Sailing schedules change. Final ETD is based on the latest release info. -
What if booking is cancelled or rolled after stuffing?
Usually due to overbooking; the carrier may cancel unstuffed space or roll containers to the next vessel. -
Why is space not released after booking?
Possible reasons: freight not confirmed, incomplete booking details, or tight capacity. -
What if booking or space info changes?
Must update carrier immediately, especially for sensitive cargo or LCL volume/weight changes. -
Time gap between space release and container release?
Typically 1–3 days, but varies by route, carrier, and market conditions. In special cases, delays may occur.
