I am outfitting a large charter deep sea fishing boat with 15 cameras. I need to figure out what cabling I need to install to network all of them to transmit 5v. DC and audio video feed (data). My goal is to supply all of the cameras with power so I dont have to deal with the batteries and to transmit the A/V data to a large hard drive so they can record for hours without dealing with the micro SD cards. Any help is appreciated.