A hydrophone and floats are shown on the buoy deck of the Coast Guard Cutter Sequoia, Jan. 17, 2015. The crew of the Sequoia and National Oceanic and Atmospheric Administration scientists deployed the hydrophone in the Challenger Deep near the Federated States of Micronesia in an attempt to listen to ambient sound in the deepest part of the Challenger Deep. (U.S. Coast Guard photo)
LEAVE A COMMENT