I have a 2011 Z518. It has 2 HDS5's installed on the boat. It also has the NMEA 2000 net work on the boat which was installed from the factory. My question is: Does Ranger enable the power to the NMEA 2000 to be turned off when the boat is not in use? Is there a switch to turn the NMEA on and off? I added a sonic hub to my boat and just bought a LWX-1 antenna. I'm trying to find out where to connect the antenna to a power source. There is no swictch for the antenna to turn it on and off. I'm not wanting my battery to be drained. Any help would be appreciated. I do not have a master power switch on my dash.