> 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/master-data/emission-pool.md).

# Emission Pool

An Emission Pool can be used to deduct a set percentage of the [FuelEU compliance penalty](/release-8.31/voyage-management-system/step-by-step-guides/master-data/eu-ets-compliance/fuel-eu.md). A pool will have a name, a short-code, and a default percentage.

After creating an Emission Pool, it can be added to a [Vessel](/release-8.31/voyage-management-system/step-by-step-guides/voyages/maintain-voyages/overview/vessel.md) or a [Time Charter contract](/release-8.31/voyage-management-system/step-by-step-guides/voyages/maintain-voyages/overview/tc.md). These in turn can have their own pool deduction percentage, which functions as an override of the percentage set on the pool. By default however, they will fetch the percentage from the Emission Pool itself.

The percentage from the TC In or Vessel is then brought down to the Voyage level when calculating the [compliance penalty deduction](/release-8.31/voyage-management-system/step-by-step-guides/master-data/eu-ets-compliance/fuel-eu.md#deductions).


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