Tiny Autonomous Submersible
dAzED1 writes "The BBC is reporting that Australian researchers have built a 40cm, self-controlling submarine that can dive to 5,000 meters. It's small enough that there is concern it could simply be eaten, or worse, used by the military. My question is, at 1 m/s, how does it get to 5km before the 1-day battery dies?"
How does it do it in a day? Easy
Here is the main site...