> 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/dvl-75/communicating-with-the-dvl/commands-accepted-by-the-dvl/send-dvkfb.md).

# SEND-DVKFB

The SEND-DVKFB command turns the $DVKFB output message sending process on and off. The effect persists across power cycles. The parser is more lenient with the “on” message than the “off” message.

Examples:

SEND-DVKFB ON

SEND-DVKFB OFF