> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/omnitrack/additional-omnitrack-system-components/gnss-compass.md).

# GNSS Compass

The Omnitrack includes a GNSS compass that can connect to the ROVL topside unit. A GNSS compass consists of two GNSS antenna/processing modules (a base and a rover) that connect to the ROVL topside unit.

We strongly recommend that Omnitrack systems include a GNSS compass. The system will work without a GNSS compass with many features lost, but ROV location accuracy is compromised and additional software work is required by the user to provide the ROV with a [global origin and initial position](broken://pages/UklrJ2dQN7ZmtpfcEvGh). 

<figure><img src="/files/Aeulf5q1cAtHnKQ8rfh2" alt=""><figcaption></figcaption></figure>