[jnsaff2]

Wouldn’t drag increase with the pressure?

[moosedev]

I think I read in one of the earlier Titan threads this week that density increases pretty slowly with water depth. Water isn't very compressible, after all. So, to your question, I would guess "yes, but not by much".

[jtriangle]

It does, but, it's not terribly important given you're not limited by power output in a stealthy submarine.