US nuclear submarine hits mystery object in South China Sea

US Navy says 11 sailors were injured in the incident on October 2

The 'USS Connecticut', a Seawolf-class fast-attack submarine, leaves the Kitsap-Bremerton naval base in Bremerton, Washington, on May 27, 2021. US Navy / AFP

A US nuclear-powered attack submarine struck an unidentified object while submerged in international waters in the Indo-Pacific region last week, the US Navy said.

“The submarine remains in a safe and stable condition. USS Connecticut’s nuclear propulsion plant and spaces were not affected and remain fully operational,” the US Pacific Fleet said late on Thursday.

The extent of the damage from the October 2 incident is being assessed, it said.

A US Naval Institute News report, citing a defence official, said 11 sailors suffered minor to moderate injuries when the submarine hit an unknown underwater object in the South China Sea. The vessel is now headed to the US base at Guam, it said.

The last known incident of a US submarine striking an underwater object took place in 2005, when the USS San Francisco struck an underwater mountain in a collision that killed one sailor aboard, it said.

The US Navy’s surface fleet has suffered several accidents in the busy Western Pacific in recent years, including back-to-back collisions involving two guided-missile destroyers in 2017. Those incidents prompted the dismissal of the Seventh Fleet’s commander and extensive investigations into naval training, policies and equipment.

The USS Connecticut is one of three Seawolf-class submarines, which the US Navy describes as “exceptionally quiet, fast, well-armed, and equipped with advanced sensors.” The vessels have eight torpedo tubes and can hold as many as 50 weapons in its torpedo room.

The Seawolf class was a product of the Cold War, conceived to maintain the US’s acoustic advantage over Soviet submarines and hunt them down, the Naval Technology website said.

The incident occurred at about the same time as a large training exercise by US allies with three aircraft carriers sailing in the nearby East Philippine Sea. The exercises were among several gestures toward Taiwan by the Biden administration and its allies in recent days.

The Connecticut’s collision comes just weeks after Australia, the UK and the US announced a new security arrangement. The so-called Aukus pact also created a rift with France, which saw a $66 billion deal to provide Australia conventional submarines voided in favour of a deal for American-made nuclear-powered ships.