Fibre Optic Subsea Cables And Internet Infrastructure

Light takes .489 milliseconds or roughly a half millisecond to go 100 kilometers. Get the route miles and you have a great approximation because optical amplifiers or end point electronics have little impact. So Dunant is 13,200 kilometers CLS/CLS. That is 132 times a half millisecond or 66 milliseconds RTD.

For full details, click on https://www.m2optics.com/blog/bid/70587/calculating-optical-fiber-latency.