[entropicdrifter]

One would imagine that the signal to noise ratio for wireless data transmission in the ocean would be pretty abysmal. That said, there's no reason why they couldn't just run a fiber optic cable out from it, as long as it's designed to rotate around said cable.

[HenryBemis]

I thought of the cable solution, but that would have some wear and tear if the capsule gets to move around. I was imagining a periscope-y antenna, in the form of a buoy.

[theelous3]

Short range high power wireless to cable. Basically cable but with a wear buffer.