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Why does it produce sound? Why not infrared or something easily detectable?
by antocv 13y ago
Why does it produce sound? Why not infrared or something easily detectable?
- bodhi 13y agoI think they often end up underwater? In that case, sound seems to be the more used medium, unless hollywood stories about sonar have led me astray...
- emillon 13y agoUnder water, I assume that sound is easier to detect than IR.
- masklinn 13y agoInfrared doesn't work underwater, water covers most of the earth surface and it's where the hardest to find crashes are located.
- rcxdude 13y agoFor communication under(salt)water, you're pretty much screwed with every part of the electromagnetic spectrum apart from visible light, and even that won't work in cloudy conditions or if the emitter is occluded. Sound is really the best option.
- cynwoody 13y agoBecause infrared doesn't work very well in water, and crashes in water are the biggest challenge for finding wreckage. Airliners also carry emergency locator transmitters† (ELTs), which, when activated by a crash, transmit radio signals which can be triangulated via satellite. However, ELTs do not work underwater. No ELT signals from MH370 were heard. †http://en.wikipedia.org/wiki/Emergency_Locator_Transmitter http://en.wikipedia.org/wiki/Emergency_Locator_Transmitter