The Raymarine requires an optional interface to provide 0183 data but if you use one, it could connect NMEA 0183 data to your RD33. (Assuming you have purchased the optional NMEA 0183 cable for your RD33 display) The RD33 is NMEA 2000 with the optional NMEA 0183 support. The NMEA 0183 supports one input and one output. That means you would have to decide on one 0183 device you want to input. (unless you purchase some sort of combiner box) I don't know what you are expecting from the radar to your RD33. If the purpose is to input the Raymarine and output to the radar; it is possible. Your post isn't clear on what your plans are.