The rope filaments are interwoven with four communications wire in such a way that if strain is put on the rope can stretch and the wires still function. The cable reels are available in 50mtr or 100mtr complete with drum. These are complete ready to dive assemblies comprising of length of ropecoms line cable drum 4 pin RMG type connector strain relief termination with stainless steel thimble attachment for the diving harness and with connector break out to the side.