Quote:I imagine that it's simply the sonar equivalent of a modem tone in a different sonar frequency range, with lots of error correction for ambient noise in the ocean. Basically, the fax-like sounds you hear when you accidentally pick up a phone while using dial-up Internet -- but at higher pitched sounds and through water.
(I imagine that if it's used in a widespread manner all over the ocean, could be incredibly noisy to the marine life. If you hate the fax tones, imagine an ocean full of it! But I can see the benefit if used during more limited near-range applications, like boat-to-diver applications)
Edited by mdrejhon - 10/16/13 at 12:54pm