Friday, August 2, 2013

Friday Fun-Fact: What the Military Used 'Before' Radar... (4pics)

The use of Radar in the military seems as old as military itself... and believe it or not, there was a time (long ago) where the military had to resort to other means. 
...such as these low-tech and gigantic 'acoustic locators'... seriously this is real. 

These acoustic locators worked in much the same way as a submarine or bat's sonar would—through active and passive echolocation. Operators could merely listen to the surrounding battlefield to analyze for aircraft or engines, or produce a signal that would reverberate off the distant artillery and give a sense of the enemy's location.


via gizmodo


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