A new type of submarine cable named as “Composite Cable” has been developed and put into practical use in order to increase reliability of mooring and seabed cables.“Composite Cable” unified the signal transmission part and surrounding protection part consisted of many bands of steel wires, which proves the strength against the tension out-force without loosing flexibility. This paper describes results of field applications of the Composite Mooring Cable and of real time coastal wave monitoring system using the cable. It also describes prototype Composite Seabed Cable design and installation at one of the NOWPHAS stations.
