[n6h6]

I read "submarine cables" and imagined a sort of monorail or guide-wire for an underwater vehicle. I thought, "I guess that makes sense, that'd probably be cheaper or safer than an untethered submarine".

It's funny how "good" the brain is at rationalizing misconceptions like that.

If I hadn't read a couple comments to try and see why Africa (or anyone) would need a safety-rope-assisted underwater submarine I might have gone on assuming that was just a normal thing.