Summary and Key Points: In a 2005 naval exercise, the Swedish diesel submarine HSMS Gotland astounded the maritime world by 'sinking' the USS Ronald Reagan, a U.S. nuclear-powered aircraft carrier.
-Despite facing a formidable carrier strike group, the Gotland managed to breach the U.S. Navy's anti-submarine defenses and score multiple simulated torpedo hits.
-This feat highlighted the capabilities of the Gotland’s modernized Stirling engine, which allowed it to operate silently and evade detection.