The Gotlandclass submarines are the world's first submarines to feature a Stirling engine airindependent propulsion (AIP) system, a technological marvel that revolutionized underwater endurance. This system, usually exclusive to nuclearpowered submarines, allows these subs to stay submerged for weeks. Traditional diesel subs surface every few days to recharge batteries, but the Gotlandclass 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 sonarresistant hull coating, a radarabsorbent tower, and rubber acousticdeadening buffers to minimize sonar detection.
Its weaponry includes four 533mm torpedo tubes that can fire heavyhitting Bofors Underwater Systems Type 613 torpedoes, and a pair of 400mm tubes that can hold two Saab Bofors Underwater Systems Type 43X2 lightweight multirole torpedoes each.
Their stateoftheart combat management system can guide multiple torpedoes during a single attack.
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