# Bay Plan

*Last updated: 2026-06-26*

> Before a container vessel takes on its first box, the bay plan – also called a stowage plan – assigns each container a precise position aboard the ship: bay (longitudinal section), row (transverse position), and tier (vertical height).

Before a container vessel takes on its first box, the bay plan – also called a stowage plan – assigns each container a precise position aboard the ship: bay (longitudinal section), row (transverse position), and tier (vertical height). Shipping lines and terminal operators draw up this schematic slot-allocation diagram in advance and align it with the vessel's master. Planning must balance vessel stability, trim, weight distribution, port rotation, and crane reach – containers destined for the next port of call are stacked where they can be accessed first. Crane operators, stevedores, and ship's officers work exclusively from the bay plan; any deviation requires a formal amendment. Errors are expensive: misplaced containers must be restowed, generating extra crane moves, port dues, and delays.

**Source:** [https://en.wikipedia.org/wiki/Containerization](https://en.wikipedia.org/wiki/Containerization)

## Quick Facts

| Property | Value |
|---|---|
| Term | Bay Plan |
| Language | EN |
| Word count | 122 |
| Last updated | 2026-06-26 |
| Source | https://en.wikipedia.org/wiki/Containerization |

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