# Emission Pool An Emission Pool can be used to deduct a set percentage of the [FuelEU compliance penalty](/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](/voyage-management-system/step-by-step-guides/voyages/maintain-voyages/overview/vessel.md) or a [Time Charter contract](/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](/voyage-management-system/step-by-step-guides/master-data/eu-ets-compliance/fuel-eu.md#deductions). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.dataloy.com/voyage-management-system/step-by-step-guides/master-data/emission-pool.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.