# 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 
3. If the vessel has an IMO-number, click on the ![](https://content.gitbook.com/content/uZ9lzqgHX4JL1Df67xog/blobs/2jDs1EZp8iMDh0QzVNt5/outline_settings_input_antenna_black_24dp.png) icon in the top right.

{% hint style="info" %}
A light grey icon indicates that the vessel has no IMO-number registered.\
A dark grey icon indicates that it is not subscribing to AIS-positions. \
A blue icon indicates that the vessel is subscribing to AIS-positions.
{% endhint %}

![](https://content.gitbook.com/content/uZ9lzqgHX4JL1Df67xog/blobs/d5ANG5M5J9ztgEmz7tfS/image.png)