41. Brian Simpson, said the hydrophone recorded a loud noise in the water, followed by others over the next 10 minutes. 42. The buoy relays acoustic information from its hydrophone ( s ) via UHF / VHF radio to operators on board the aircraft. 43. By determining the sound's time of arrival at each hydrophone , the 3D position of the fish can be calculated. 44. The lights in " U-353 " went out and water entered forward and aft through the hydrophone shafts. 45. Since the pinger signal is relatively weak, the hydrophone must be within about one nautical mile ( ) to detect it. 46. It's just a sound that it generates so it can be picked up by a hydrophone / Towed pinger locator. 47. A hydrophone dipped into the water after the sun went down one night let our group eavesdrop on their high-pitched vocalizations. 48. He installed a hydrophone a quarter mile off the beach into the Pacific a year ago to eavesdrop on this usually unheard world. 49. Never having deployed one past a mile, the titanium-shelled hydrophone was designed to withstand the immense pressure 7 miles under. 50. One torpedo had found its mark on the battleship's bow, which caused flooding of the hydrophone compartment and 18 casualties.
