They don't.
they use underwater echo sound location!
They use a bit of echo location. Besides, out in the open ocean there isn't that much to collide with.
they use echo location to find their food. they will send out a squeck and when it bounces off something the sperm will go for the kill.
Bats use echo location, they track down sounds of prey by their sound waves.
Echo Location, it's a form of sonar sound they can make that bounces off a solid object and they can sense where it is
No only bats use echolocation
i have read a lot about sharks and sharks,just like whales, can use echo location to find things and if thats wrong they have tiny holes on the side of their head to hear.
Echo location.
Echo Location really is the answer
Something called echo-location
Not unless you're a bat
It doesn't, that is why they use echo location.