Underwater node for electrical power distribution and optical data transmission for multidisciplinary science in the Mediterranean Sea

An underwater Junction Box with 3500 meters deep rate has been designed and realized to distribute electrical power and an optical fiber channel for communication. The Junction box is a part of the IDMAR infrastructure and is presently operative. IDMAR is a sea floor network devoted to host cross-fertilisation sea science. This paper describes the technical solution adopted to address the Junction Box extreme operational environment.