Submarine communications cable

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A cross section o the shore-end o a modren submarine communications cable.
1 – Polyethylene
2 – Mylar tape
3 – Straundit steel wires
4 – Aluminium watter barrier
5 – Polycarbonate
6 – Copper or aluminium tube
7 – Petroleum jelly
8 – Optical feebres

A submarine communications cable is a cable laid on the sea bed atween laund-based stations tae cairy telecommunication seegnals athort stretches o ocean.