Friday, June 1, 2012
Submarines Navigate Using "Echolocation"
Submarine sonar technicians are basically blind. The water pressure at these depths make it impossible to put windows to the outside of the submarine leaving them with only their sense of sound to detect objects. It is a bit different than echolocation in air because sound travels differently in water than in air. (more about that in another post) Basically, it is subject to differences in water pressure as you will see in this video, but it also has it's own pressure propagation characteristics that are intriguing. (See Wikipedia article on Speed of Sound.)