While I have no direct involvement with underseas fiber infrastructure, I've long been interested in the spread of communications, especially to the developing world, so I've tracked international submarine cable deployments for many years. Today, I was looking at the new submarine cable directory from the Submarine Telecoms Forum and a friend looking over my shoulder said "Wow, where does that come from?"
So if you also want a brief distraction from your busy day, here are the submarine cable sites I follow:
But for cable by cable data, with maps, I love the the Submarine Telcoms Forum's Submarine Cable Almanac. It has detailed data and individual maps for over 200 cables systems. So where overview maps like Greg's above give you a global picture, SubTelForum's Almanac has per-cable maps like this: