I dont know about ethernet to H5000, but I have
Navico radar running wireless (and wired) on my
boat. Take the ethernet cable from the Radar interfacebox and
plug it to a switch. You will either have to buy a
B&G one or cut off one end of the cable and crimp on a rj45
plug to use a normal switch. Signal is the same, plug is the only differance. You can then run a ethernet cable from the switch to your PC and probably one to the H5000 if that is any point.
I have no problem using radar wireless on the computer, but I have made sure no old and slow devices is connected to the
network.