Question

submarine telegraph cables

Accepted Answer

Insulated copper cables laid along the bottom of a sea or ocean for telegraphic communication. The first short cable was laid across the English Channel in 1851; the first successful transatlantic cable was laid in 1866. In the late 1980s this technology was replaced with large submarine fiber optic cables that still today form the basis of most global communication.

Front	submarine telegraph cables
Back	Insulated copper cables laid along the bottom of a sea or ocean for telegraphic communication. The first short cable was laid across the English Channel in 1851; the first successful transatlantic cable was laid in 1866. In the late 1980s this technology was replaced with large submarine fiber optic cables that still today form the basis of most global communication.

Cables Laid Submarine Communication Telegraph Insulated Copper Bottom