Lowrance HDS PRO Operator's Manual page 243

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A waypoint will be received when the waypoint is created on the
other device, if the following settings are in place:
• The receiving device - the receive waypoint option must be set
to ON before the waypoint is created in the sending device.
• The sending device - the send waypoint option must be set to
ON before the waypoint is created.
Send waypoint
Allows this unit to send a waypoint to other devices over the NMEA
2000® network.
A waypoint will be transmitted when the waypoint is created, if the
following settings are in place:
• The sending device - the send waypoint option must be set to
ON before the waypoint is created.
• The receiving device - the receive waypoint option must be set
to ON before the waypoint is created in the sending device.
Backlight synchronization
Select this option to allow display brightness synchronization across
display units connected to the same network.
NMEA 0183® setup
The NMEA 0183® port(s) must be set to suit the speed of connected
devices, and can be configured to output only the sentences
required by listening devices.
Receive waypoint
Select this option to allow a device capable of creating and
exporting waypoints via NMEA 0183® to transfer directly to this unit.
Serial ports
Specifies the baud rate and protocol for the NMEA 0183® interface.
The baud rate should be set to correspond with devices connected
to the NMEA 0183® input and output.
Serial output
Selection determines whether the data is output via Tx lines, and
will enable editing of the output sentences list.
Tools and settings| HDS Pro Operator Manual