目前,在海洋调查仪器向着自动化电子化方向发展的时期,电缆常常是仪器不可缺少的组成部分。它起到供电、输送信号、以至钢缆、传感器的作用。海洋仪器经常要投放到比较深远的水域进行观测,因此要求与仪器相联的电缆及其接头应有良好的水密特性。在吊挂或拖曳仪器的时候,耐拉力电缆常兼作钢丝绳。因此,电缆各部位应具有足够的抗拉强度。另外,为了操作贮运的方便,电缆通常经绞车收放或存容,因此要能承受弯曲的作用力。此外,电缆接头应具有适应海洋环境的能力。诸如:冷热、潮 At present, cables are often an integral part of instrumentation in the days when ocean survey instruments are moving toward automated electronics. It plays a power supply, transmission signals, and even the role of steel cables, sensors. Marine instruments often have to be deployed to observe the more far-reaching waters, and therefore requires that the cables and their joints associated with the instrument should have good water-tightness. When hanging or towing instruments, often resistant to pull cable as a double rope. Therefore, all parts of the cable should have sufficient tensile strength. In addition, for ease of handling, the cable is usually retracted or stored by a winch and therefore capable of withstanding bending forces. In addition, the cable connector should have the ability to adapt to the marine environment. Such as: hot and cold, tide