Exposing a bottle-nosed dolphin to a couple of minutes of nearby sonar pinging could cause some temporary hearing impairment, a new test finds. What sonar does to marine mammals has become a hotly ...

When it comes to mapping and navigating underwater environments, nothing beats sonar. You see it all the time in movies. Naval vessels send out bursts of sound and that can identify what's around them ...

Military sonar can have a serious effect on some ocean animals. Could natural noises produced by sealife be used to locate undersea threats? Whale skeletons stand guard around the coastline of ...

SEATTLE — The National Marine Fisheries Service said Thursday it has authorized the U.S. Navy’s proposal to expand sonar testing and other warfare training off the Northwest coast, after determining ...

Unfortunately for many whales, dolphins and other marine life, the use of underwater sonar (short for sound navigation and ranging) can lead to injury and even death. Sonar systems—first developed by ...

Navy-funded researchers recently tagged four whales and two Risso’s dolphins near San Clemente Island to see what effects Navy sonar training has on marine mammals’ movements and behavior. The study, ...