+Sonar, or **SO**und **N**avigation **A**nd **R**anging, is a technique that uses [Sound Waves](/wiki/Sound_Waves) to navigate, communicate, or detect objects in water. By emitting pulses and listening for their echoes, sonar creates a picture of the unseen, revealing depths and objects for uses like [Navigation](/wiki/Navigation) and mapping.
+## See also
+- [Acoustics](/wiki/Acoustics)
+- [Echolocation](/wiki/Echolocation)
+- [Radar](/wiki/Radar)
... 1 more lines