Rdp 149 bbw gps issues

I have the rdp 149 and I recently connected the bbw gps but only got it to work one time to locate where we were moored and now cannot get it to do anything else. There's also this red line that goes a long ways from here and then back almost like a route. Can't figure out how to get rid of it and get this unit working. It's connected to data port one

The red line that you are seeing most likely the heading vector line.
You might want to call into tech support from the boat for assistance and testing why the GPS is not working for you.