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Submarine cable reeled in to ship
In other respects, the science of laying submarine cables has barely changed from the early days.
The method of recovering cables for repairs is essentially the same — it consists of using a grappling hook on the end of a rope up to five miles long.
According to Cable & Wireless Worldwide — the company that has inherited much of the world's submarine infrastructure — the rope used today is often more expensive than the cable it recovers.
Photo credit: Cable & Wireless Worldwide