What You Need to Know: The Rubis-class submarine's surprising success against the USS Theodore Roosevelt in a 2015 war game ...

Journalists were granted rare access to one of France’s Rubis-class nuclear-powered submarines as it was being readied for sea in the naval dockyards in Toulon. The French navy’s fleet of ...

Meanwhile, nuclear-powered attack submarines can effectively hunt enemy subs and can sink enemy naval targets. During war games in March, a French Rubis-class sub even "sunk" a US aircraft carrier.