Modern submarine cables use fiber-optic technology to carry digital payloads across oceans. They transport over 99% of all international data traffic.

Anatomy of a Cable

While the optical fibers are as thin as a human hair, they are encased in multiple protective layers:

• Polyethylene sheath
• Mylar tape
• Stranded steel wires (armor)
• Aluminum water barrier
• Polycarbonate
• Copper or aluminum tube
• Petroleum jelly
• Optical fibers