In the control room of the American Virginia class attack submarine USS Minnesota, off the Western Australian coast, sonar operators adjust to the chatter of dolphins in new waters where the U.S.

The visit comes as the U.S. is assisting Australia in acquiring conventionally armed, nuclear-powered attack submarines.

SEOUL, South Korea — North Korea unveiled for the first time a nuclear-powered submarine under construction, a weapons system ...

The U.S. Navy owned three submarines before Holland. In the 1860s, during the Civil War, the Union Navy had the U.S.S. Alligator, a 47-foot-long submersible propelled by a hand-cranked propeller.

North Korea on Tuesday accused the United States of a "hostile military act" after a US Navy submarine docked in arch rival South Korea to replenish supplies. "We express grave concern over the U ...

Tension on the Korean Peninsula has risen as heavily sanctioned North Korea unveiled its first nuclear-powered submarine on Saturday, which is currently under construction. The development of this ...