CNN At This Hour With Berman and Michaela March 21, 2014 15:06:00
My d hydrophones. how hard is it to search under water? what kind of equipment do you need to scan that ocean floor? >> the hydrophone is a passive device. it listens from the ping from the beacon on an aircraft. once that ping is heard, they have an idea where the location is. if that beacon dies and the pings are no longer there, you have to search for deep ocean sonars. we use deep ocean sonars to find objects on the bottom. they have a rarnge. our sonars have a range of 1250 meters. we do a swath of 2500 meters which resulted in 85 square nautical miles a day searching. it is a very slow, ...
Source: archive.org