Whenever submarine cables comes to my attention, the one thing I'm always curious about is what happens when they break? This article links to another they pos

Whenever submarine cables comes to my attention, the one thing I'm always curious about is what happens when they break? This article links to another they posted[1] and they then link to Wikipedia[2], and there's some exposition given on what happens when things break, but if these things are 3 inches thick and thousands of miles long, other than burying them and having ships nearby to go out and make repairs, is there anything special that the maintainers of these cables do to safeguard against damage? Has anyone covered that in a good article somewhere that I can read? Not only that, but while a cable is broken, are there redundant cables along the same path, or is traffic routed around the problem via some long detour? Is there a way to see the cut-off from cross-continent round-trip time graphs? [1]: http://www.extremetech.com/computing/96827-the-secret-world-of-submarine-cables http://www.extremetech.com/computing/96827-the-secret-world-... [2]: http://en.wikipedia.org/wiki/Submarine_communications_cable#Modern_history http://en.wikipedia.org/wiki/Submarine_communications_cable#...