> 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/sonarview/session-configurations/rovl-+-nmea-output.md).

# ROVL + NMEA Output

It may be useful to output NMEA formatted data from SonarView representing the position of the target unit (transmitter/transponder).

To set this up, go to Session Configurations and add the ROVL as a device

<figure><img src="/files/sqx5c20NQdRRIZ3AIL7I" alt="" width="277"><figcaption></figcaption></figure>

Then add an NMEA Ouput device. This is where the NMEA data will be sent to from SonarView. You can configure which messages you want.<br>

<figure><img src="/files/xvHPSuL2PUkqBzTmXbpu" alt="" width="276"><figcaption></figcaption></figure>

Finally, add them to a session and connect to it.  Once the topside unit has a global position and the ROVL is getting valid data, NMEA data will automatically sent to the specified location.

<figure><img src="/files/CProFx9CuOw2FNjPPhIu" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/UhloZys3d677HmIbmXHP" alt=""><figcaption></figcaption></figure>

Example below shows the data coming out

<figure><img src="/files/k2UO4kiFOKWnJRDh2Kf3" alt=""><figcaption></figcaption></figure>