The U.S. Navy regularly conducts training exercises to simulate and prepare for combat. In 2015, a tiny sub "sank" one of its ...

The Marines and Navy are training to combat enemy submarines with sonobuoys. This isn't a normal mission for Marines.

China's surface navy is growing at a rapid pace as busy shipyards turn out new warships, but the US maintains an edge ...

By the 2030s, the world’s oceans may become as transparent to sensors as the skies became to radar in the 20th century. With ...