A nonarmored submarine telegraph cable

Most of the world´s submarine cable mileage lies in soft ocean bottom where the customary armor wires are not required for protection of insulation against abrasion. An experimental length of unarmored cable having polyethylene insulation over a central conducting core of cadmium bronze sufficiently strong to permit of laying and repair has recently been laid. This paper describes the mechanical and electrical design features, the problems encountered in laying and repair at sea and their solutions.