> For the complete documentation index, see [llms.txt](https://docs.dataloy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dataloy.com/release-8.31/voyage-management-system/step-by-step-guides/chartering/time-charter-contracts/maintain-time-charter-contracts/duration-and-rates.md).
# Duration and Rates
In the **Durations and Rates** tab you will see two main sections**;**
* **Durations**, which includes create-button and a list of the durations of the Time Charter Contract (TC)
* **Duration and Rates** which includes a list of the **Rates** along with the connected **Duration** of the TC
New Durations and Rates layout introduced in v8.25
From version v8.25, both of these lists are turned into a grid, which means you can now use [all of these functionalities](/release-8.31/voyage-management-system/step-by-step-guides/data-grids.md).
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