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
By: Freight forwarder or shipper
Content: Cargo details (commodity, weight, volume, container type/quantity), POL/POD, sailing schedule (ETD/ETA), special requirements (hazardous cargo, temperature control, etc.)
Space Confirmation
Issued after carrier’s review, including:
Vessel/Voyage
B/L Number
CY Closing date
ETD (Estimated Time of Departure)
Validity period for space (cargo must be loaded before this date)
Some routes may require prepaid freight or booking deposit
Next Steps
Use space confirmation to apply for container release (pick-up).
Arrange trucking, customs clearance, and stuffing.
II. Container Release Process
Container Pick-up Application
Provide: Booking number, pick-up location, container type & quantity
May require deposit or guarantee (commonly known as container deposit)
Issuance of Release Order / EIR
Issued by carrier or terminal, includes:
Container number(s)
Vessel/Voyage
Pick-up/Return depot
Validity period
Container Pick-up and Loading
With the release order, collect empty container from depot
Inspect and sign-off
Deliver to factory for stuffing
Return full container to terminal or designated yard
III. Common Questions & Quick Reference
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.
