# Assignment of Container Slots

*Last updated: 2026-06-16*

> Shipping lines, port terminal operators, and rail logistics coordinators use container slot assignment to give each container a precise physical position – on a vessel (bay/row/tier), in a terminal yard, or on a flatcar.

Shipping lines, port terminal operators, and rail logistics coordinators use container slot assignment to give each container a precise physical position – on a vessel (bay/row/tier), in a terminal yard, or on a flatcar. On the sea freight side, the assignment feeds directly into the stowage plan: container weight, hazardous cargo classification, destination port, and structural load limits all determine where a box may be placed. Effective slot assignment reduces unnecessary re-handling in the yard, shortens loading time, and lowers overall terminal costs. It is distinct from slot booking with a carrier, where a shipper reserves space on a vessel; container slot assignment concerns the actual physical placement of cargo once it arrives at the facility.

**Source:** [https://www.imo.org/en/OurWork/Safety/Pages/Container-stowage-plans.aspx](https://www.imo.org/en/OurWork/Safety/Pages/Container-stowage-plans.aspx)

## Quick Facts

| Property | Value |
|---|---|
| Term | Assignment of Container Slots |
| Language | EN |
| Word count | 116 |
| Last updated | 2026-06-16 |
| Source | https://www.imo.org/en/OurWork/Safety/Pages/Container-stowage-plans.aspx |

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