Node and junction box services and interfaces for a local sea bottom observatory

This simplified and optimized design for a local sea bottom observatory provides the same infrastructure, services and interfaces for the instrumentation connected to the junction box as a large scale cabled network: trawl resistant frame, corrosion and fouling resistant design, maintainability, nodes and junction boxes, wet mateable connectors, various voltages and data interfaces, network extension (optical or VDSL2), time synchronization (NTP, PTP 1588v2, NMEA PPS), embedded controller for monitoring internal parameters and science ports, fail over, redundancy, network management protocol, remote control and supervision. We describe in this paper how can we optimize the design and reduce the cost of such a local or coastal network, without jeopardizing the reliability of a submarine network.