jobes

The US has already reportedly been doing this.

NotAnUndercoverCop

I've heard about the splitters the NSA put on AT&T's backbones. But, I didn't hear about them tapping the ocean lines.

I'm not one of those assholes who replies to posts with only the word, "Source?" But, do you have a source for this? I'm just curious and would like to read about it. I'm in no way attempting to be condescending like 99% of the people who reply with only, "Source?" implying what you've said is BS. Which I'm not.

Caboose_Calloway

There is at least one US submarine modified specifically for that task.

https://en.wikipedia.org/wiki/Operation_Ivy_Bells

jobes

Hmm I'll have to try to dig one up. I read about it a while back. I believe the context of the first time I saw the story was the US tapping lines in/out of Russia, then someone tipped off the Russians and they found and took the device before the US could reclaim it. I'll see if I can find it.

zoetry

That's be massively more expensive, complicated, and slow.

zoetry

The data's got to go from one continent to another somehow. Cables are the easy way. Laying those along the seafloor is the easy way of doing cables.

edit: Here's what wikipedia's got on the topic.