A Peek at latencies for undersea and satellite data traffic. What did Ping or tracert just tell you?

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Cuba following a new path via Telefonica and recording significantly lower latencies. Latency measurements from four cities are illustrated in the graphic on the right.We must emphasize lower latencies because, despite the drop, these aren’t exactly lowlatencies. Our measured latencies to Cuba are still quite high, albeit improved. The fact that the latencies to Cuba from many locations around the world have dropped below 480ms means that the new Telefonica service cannot be entirely via satellite. However, if it were solely via submarine cables, we would expect latencies from many nearby countries to be less than 50ms.(Note: Round trip latencies for crossing the Atlantic and Pacific oceans are approximately 60ms and 110ms, respectively.)

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http://research.dyn.com/2013/01/cuban-mystery-cable-activated/

http://www.submarinecablemap.com/