A system for enabling communication between an underwater fluid extraction facility and a remote location comprises a fiber-optic cable connected between the facility to the remote location, signal transmission means at the remote location for transmitting signals to the fiber-optic cable, a distribution hub for receiving signals from the other end of the cable and at least one secondary hub located at the facility in communication with the distribution hub. Communication between the facility and the remote location is effected using a Local Area Network. Preferably Ethernet signalling is used throughout the network.