"Another unrelated problem. You being an engineer will enjoy this one. The city has a water leak. They are not sure where the leak is. They can not dig up a whole city block to find it so they use a clever trick. They put two microphones about 50 feet apart where the leak seems to be. Then then record the random sound of water hissing out of the pipe. The two microphones are wired to left and right channel of the recorder. By adjusting the time delay of the right or left microphone they can find the sweet spot where the random noise from one microphone matches the random noise of the other microphone. Once the delay is know they know where the leak is within 1 or 2 feet. That is a clever trick. "

HA, HAHAHAHAHAH

HydroTDR

Water Domain reflectometry

Feel free to add your own, this could be fun. Water Wave Technology.

Oh, and sound is so much faster in water, but then that gives alot more accurate transmission, which os probably necessary to make this possible.

WDR. Water Domain Reflectometerty.

Yeah fukit