CNN CNN Newsroom April 8, 2014 19:26:00
So its instant. as soon as it hits the water, it starts pinging. >> it doesnt take a lot of water to activate. its designed that way. >> so if this were in an airplane, and hit the ocean, this would start immediately, this pinging sound? >> if it was not damaged in the incident. >> reporter: in perfect conditions the pingers pulse can travel as far as 2 1/2 nautical miles. ocean caverns and cliffs, even vegetation can get in the way limiting that distance, though. before any beacon is shipped fr...
Source: archive.org