AIS to chartplotter connection

[dvarholy]

Have always been able to get this to work on previous boats, but not this time. Recently upgraded my antique Furuno CRT radar with a newer NAVNET unit, an RDP-149, and want to connect it to my SIMRAD RS40-B to display AIS targets. Was told to use DATA2 set at 38,400 baud on the chart plotter and connect the wires to the radio. No targets appear. I know the radio is outputting AIS data because my laptop shows targets when connected. Either I have wires switched, a setting is wrong on the chart plotter, or both? Once I figure that out, can the chart plotter and laptop be connected to the same radio at the same time? If all else fails, is there a recommended technician here in Baltimore?

Daniel

1989 Tradewinds 43' MY

 

[ScottRhodes13]

Assuming you have the wiring right and the chart plotter's NMEA 0183 configuration correct, you might want to also make sure that the chart plotter is configured to display AIS targets. That's usually a setting somewhere that's fairly easy to reach, as people like to shut off the display when coming into a congested area like a marina.

You should be able to connect both your computer and your chart plotter to the radio. NMEA 0183 specifications allow one output to connect to up to four inputs. You can't connect multiple outputs to the same input though.

 

[rgano]

Don't know if this helps, but I have the RDP-149 with a Furuno AIS plugged into it, and I THINK the baud rate is set to 4800.

 

[dvarholy]

Thanks to everyone for the help.

Daniel

 

[l00smarble]

AIS data is always at 38,400 baud. Defintely won't work at 4,800.

Check software on the NavNet VX2 unit. You will need latest software to display AIS. And you are correct that it must come in Data port 2 and port 2 must be configured for 38,400 baud.

 

[HeadedToTexas]

Baud? Haven't seen that one for a long time. Great to still have that old school understanding in the world.