# STS

CEFR C2 · Noun

Source: https://englishreference.com/word/sts
Updated: 2026-05-10

## Definition

Stands for ship-to-ship. A way of moving people or things from one ship to another while they are both at sea.

For teachers: Abbreviation for ship-to-ship. The transfer of cargo, personnel, or fuel between two seagoing vessels while they are underway or at anchor.

## Examples

- The tankers completed the STS transfer in calm waters.
- The coast guard monitored the STS operation to ensure no oil spilled into the protected marine area.
- Conducting an STS transfer requires precise coordination between both captains to maintain a constant distance and speed, especially when handling volatile liquefied natural gas.

## Usage notes

- Often used as a modifier before another noun, such as 'transfer' or 'operation'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.