A navigation system to aid in the navigation through an unknown area. A method may include receiving a USB device request from a virtual host controller driver of a client when a host is not in a power save mode and passing a USB device request to a host controller driver of the client when the host is in a power save mode. A first resistor of the two resistors is connected between the first terminal and the second terminal. The suction port is positioned adjacent to the fluid stream. Each station transmits path quality data in its own transmissions as well as local noiseinterference data, so that other stations can obtain path quality data for a particular station even if they are out of range of that particular station.