In 2007, the British Royal Navy’s HMS Superb, a Swiftsure-class nuclear-powered submarine, collided with an undersea mountain in the Red Sea, causing significant damage to its sonar equipment.

In November 2002, the Norwegian tanker Norman Lady collided with an unidentified object in the Mediterranean, later identified as the U.S. Navy’s nuclear-powered USS Oklahoma City submarine.

In February 1992, just months after the Cold War ended, the U.S. Navy’s USS Baton Rouge, a Los Angeles-class submarine, collided with Russia’s Sierra-class Kostroma near the Severomorsk naval base.

The Soviet K-429, a nuclear-powered submarine, is infamous for sinking not once, but twice. In 1983, while still undergoing repairs, the K-429 was ordered to sea for drills.

On February 11, 1992, the USS Baton Rouge, a U.S. Navy nuclear submarine, collided with the Russian submarine Kostroma near Severomorsk during a surveillance mission under Operation Holy Stone.

The Soviet K-278 Komsomolets, a titanium-hulled "Mike-class" submarine, set the record for the deepest dive by a military submarine in 1984, descending over 1,000 meters. However, in 1989, the

In August 2000, the Russian nuclear-powered submarine Kursk sank in the Barents Sea after an explosion in its torpedo room, killing all 118 crew members. The tragedy occurred during a naval exercise,

In March 2009, the USS Hartford, a nuclear-powered fast-attack submarine, collided with the USS New Orleans, an amphibious transport dock, in the Strait of Hormuz. The incident caused over $100

In October 2003, the U.S. nuclear-powered submarine USS Hartford ran aground off Sardinia's northern coast, severely damaging its rudders, sonar, and electronic systems.

In 2000, Russia’s Kursk submarine, designed to destroy aircraft carriers, suffered a catastrophic torpedo explosion during a military exercise in the Barents Sea. The explosion, caused by hydrogen

In April 1963, the USS Thresher (SSN-593), a state-of-the-art nuclear-powered submarine, tragically sank during deep-sea trials off the coast of Massachusetts, killing all 129 crew members.

In May 1968, the USS Scorpion (SSN-589), a nuclear-powered Skipjack-class attack submarine, mysteriously sank in the Atlantic, claiming the lives of 99 sailors. The vessel was overdue for an overhaul