# AIS-subscription You can enable or disable the subscription to AIS-positions for a vessel. 1. Open the **Vessels** module in the Master Data section. 2. Open the vessel drawer There is an icon on the top right corner of a vessel drawer. \ If the icon is light grey it indicates that the vessel has no IMO-number registered. \ If the icon is darker grey it indicates that it is not subscribing to AIS-positions. \ If the icon is blue it indicates that the vessel is subscribing to AIS-positions. ![](https://3077059096-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Liw6C9Fe7rohFtkU25j%2F-LvB-GmYT1ph6iJLQNu4%2F-LvB0WJ3JyGxhCec9l3H%2Fimage.png?alt=media\&token=d30285b1-ae87-44f5-ad38-cc6ce363fc65) --- # 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/release-6.9/voyage-management-system/step-by-step-guides/vessels/ais-subscription.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.