Ask HN: Undersea Data Cables (documentaries, resources)

Looking at the world's growing submarine cable infrastructure:

http://eu-ix.equinix.com/joomladev/images/repository/Equinix_TGMap_MTS_15.pdf

I can't help but wonder if there have been any documentaries or pop-sci articles about this.

Some places like the Mediterranean or South China sea must be crawling with data cables of all sorts. What's it like to operate a cable laying/repair fleet?