The periscope has become one of the defining features of the submarine. But the newest US and British attack subs have totally reinvented how periscopes look and function. See more stories on ...

Built by BAE Systems, the Astute is slated to become the Brit’s default SSN, replacing the Trafalgar class. In total, seven Astute submarines are expected to be built, culminating a project that began ...

The Astute-class is the Royal Navy’s most advanced nuclear-powered attack submarine and the successor of the previous Trafalgar-class. The first of the class, the Astute, was launched in 2007. Though ...