Editing Underwater Robotics and the Architecture of the Abyss (section)

== <span style="color: #FFFFFF;">Understanding</span> ==
Underwater robotics is understood through '''the tyranny of the tether''' and '''the isolation of the autonomy'''.

'''The Tyranny of the Tether''': Why don't we just make all robots autonomous AUVs? Because autonomy requires batteries, and manipulating heavy valves at the bottom of the ocean requires massive hydraulic power. Batteries die fast. The ROV solves the power and communication problem by using a massive tether to the surface ship. But the tether is a tyrant. A 10,000-foot cable weighs thousands of pounds. Deep ocean currents push against the cable, violently dragging the robot off course. The robot must use half its engine power simply to fight the drag of its own umbilical cord. Furthermore, if the tether snags on a sunken shipwreck, the $5 million robot is permanently trapped and lost.

'''The Isolation of the Autonomy''': When you throw an AUV off the back of a ship and it dives 5,000 feet deep, it is more isolated than a rover on Mars. We can talk to Mars via radio; we cannot talk to the deep ocean. The AUV must be fiercely, completely autonomous. If it encounters an unexpected, chaotic current, or its primary navigation sensor fails, it cannot radio a human for help. The onboard AI must possess incredibly robust, self-healing "Fault Detection and Isolation" algorithms. It must instantly realize it is broken, drop emergency weights to become positively buoyant, and float to the surface to survive.
</div>

<div style="background-color: #8B0000; color: #FFFFFF; padding: 20px; border-radius: 8px; margin-bottom: 15px;">