Each display networks w/ 1 add. Ethernet device
Ethernet hub optional
It's important to understand how the NavNet network expands. The network will allow up to four Ethernet devices to be connected simultaneously, in which case an Ethernet hub is required. However, each display can network with one additional Ethernet device (i.e. a second display or the Network Sounder) without requiring a hub. Please refer to the diagrams to determine when you would require a hub. Ethernet hub optional.