Bananas for Scale
Submarine Internet Cable

Photo from Wikimedia Commons

Submarine Internet Cable

The armored tube that carries 99% of intercontinental data/Technology

Submarine communications cables are laid on the ocean floor and carry over 99% of intercontinental data traffic. A typical deep-sea cable is only about the diameter of a garden hose, with optical fibers at the center surrounded by layers of steel wire, copper, and polyethylene. Repeaters every 60 to 100 km amplify the signal.

Measurements

Cable outer diameter (deep sea)2.1 hundredths m
15.1 trillionthsSun diameters
420 millionthsOlympic pool lengths
1 hundredthsDoor heights
Cable outer diameter (shore end)5 hundredths m
864 quadrillionthsMercury orbit radii
2 thousandthsClock tower heights
Fiber core diameter9 millionths m
33.7 millionthsDinner plates
2.6 billionthsMonaco lengths
300 billionthsChurch steeple heights
Mass per metre (deep sea)7 tenths kg
2.6 hundredthsDalmatian dogs
70 quadrillionMimivirus particles
Repeater spacing80,000 m
39,409Door heights
8 millionThumb tack lengths
Typical cable length (transatlantic)6.6 million m
825,000Sailboat lengths
47.1 millionSunglasses widths
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