In 1968 the submarine USS Grayback was converted to an amphibious transport submarine, with auxiliary tanks added to the engine room and former missile chambers used to accommodate US Navy SEAL ...

While the U.S. has the largest and most advanced submarine fleet, Russia is catching up with the impressive and well-armed ...

Sailors aboard the Virginia-class fast attack submarine Iowa man the rails during a commissioning ceremony in Groton, Connecticut, on Saturday. (John Narewski/U.S. Navy) The Navy formally ...

The U.S. Navy has relied on submarines as an important part of its naval power since the invention of the Turtle, the first military sub, in 1775. Over the years, submarine technology improved ...

The rain-soaked event featured many Navy officials, including Navy Secretary John Phelan, hosting his first submarine commissioning. Several Iowa politicians were also in attendance, including ...

The US Navy wants to mix uncrewed underwater vehicles into its submarine forces. A commander said it's taking a "SpaceX approach" to testing, getting systems out quickly to see what works.

The rain-soaked event featured many Navy officials, including Navy Secretary John Phelan, hosting his first submarine commissioning. Several Iowa politicians were also in attendance, including ...