[Flavius]

i always thought it would be cool to develop 360 degree sonar a diver could wear to detect approaching fish

but then constant steady beeps might just guide them in

[driftdiver]

"i always thought it would be cool to develop 360 degree sonar a diver could wear to detect approaching fish "

Try a night dive if you wanna get your heart going. The only thing you can see is the fish swimming thru your flashlight beam.