In terms of types, marine cables can be divided into two categories: (civil) marine wires and cables, (military) marine wires and cables. In terms of purpose, marine cables can be divided into three categories: marine/marine power cables, marine/marine control cables, and marine/marine communication cables. Their functions are as follows: Ship/ship power cable: used for power transmission of various ships and offshore or offshore buildings. Ship/ship control cable: used for control signal transmission of various ships and offshore or offshore buildings. Ship/ship communication cable: used for signal transmission and control systems in various communication, electronic computers and information processing equipment. Model selection of marine cable The following factors shall be considered in the selection of marine cable model: 1. Purpose of the cable - for power, lighting, signal transmission, etc. 2. Cable laying position - whether long-term immersion, low temperature and shielding are required. 3. Working conditions - fixed laying, number of pipes and movable, etc.