How HSwMS Gotland Sunk an U.S. Aircraft Carrier

The Gotland-class submarines are the world's first submarines to feature a Stirling engine air-independent propulsion (AIP) system, a technological marvel that revolutionized underwater endurance. This system, usually exclusive to nuclear-powered submarines, allows these subs to stay submerged for weeks. Traditional diesel subs surface every few days to recharge batteries, but the Gotland-class preserves battery life for speed, cruising on AIP.

Stealth and evasion are enhanced by various other characteristics. The Gotland class is equipped with 27 electromagnets to counteract magnetic signatures, a sonar-resistant hull coating, a radar-absorbent tower, and rubber acoustic-deadening buffers to minimize sonar detection.

Its weaponry includes four 533mm torpedo tubes that can fire heavy-hitting Bofors Underwater Systems Type 613 torpedoes, and a pair of 400mm tubes that can hold two Saab Bofors Underwater Systems Type 43X2 lightweight multi-role torpedoes each.
Their state-of-the-art combat management system can guide multiple torpedoes during a single attack.

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