> 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/ethernet-rov-locator/configuring-the-rovle/rovle-basic-configuration/output-messages.md).

# Output Messages

<figure><img src="https://2814148991-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlN2lfY7yE0hWlcn6W1BS%2Fuploads%2FfsqCRZxbPPwKRgHBuSpq%2Fimage.png?alt=media&amp;token=ff349fd6-f504-4abf-bd93-3daaa2372de8" alt=""><figcaption></figcaption></figure>

These checkboxes control which output messages are output to the remote system via the serial/USB port and the Ethernet (assuming Ethernet is connected).

The $USRTH message is included for backward compatibility with legacy ROVL devices.

The $USTLC message is used by SonarView to visualize the location of the ROV on the SonarView map.