Early versions of the AIS 600 Installation Manual gave instructions on how to send out Safety Related Message (SRM) using a Garmin Marine Chartplotter that is connected over NMEA 2000 or NMEA 0183.

Unfortunately this is not correct and revisions to the manual were made and future version of the manual will not contain this message.

To activate an SRM on the AIS 600, a physical switch will need to be installed. Instructions for installing this switch can be found in the current version of the Installation Manual and can be found below.

"Use the bare wires from the included SRM cable to install an SRM switch. Connect the white wire from the SRM cable to one terminal of a single-pole, single-throw switch (not included), and connect the black wire from the SRM cable to the other terminal. After the switch is installed, closing the switch broadcasts a pan-pan urgency SRM. While the switch is closed, the AIS 600 will send the urgency message at a rate of one message per minute."