Wouldn't there be a physical tether?

Satellite seems like the last thing that would be used on a submarine, but I have almost zero knowledge of the actual tech used.

AFAIK, what they're currently doing is

submarine|-------optic fibre------>mothership------satellite-----internet

Yes, what a bummer. It was much more fun to watch while it was broadcasting video from the bottom. https://twitter.com/niconicoen/status/348479142871834624/pho...

Now it's back on the surface again.

http://en.wikipedia.org/wiki/DSV_Shinkai_6500