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. https://nationalinterest.org/blog/buzz/nightmare-us-navy-fears-submarine-could-sink-its-aircraft-carriers-40852
blog article
NIGHTMARE: THE U.S. NAVY FEARS THIS SUBMARINE COULD SINK ITS AIRCRAFT CARRIERS
At just 1,600 tons submerged, the three Gotland class boats are smaller than many diesel-electric submarines, but Sweden has little use for large submarines in the restricted confines of the Gulf of Bothnia and Baltic Sea. One of the most crucial improvements in submarines of the postwar era is the air-independent propulsion (AIP) system. First fielded in the 1990s, the development of AIP changed the ways non-nuclear submarines operated, allowing them to fight and hide underwater longer. Combined with their extreme quietness, the use of AIP has made modern diesel-electric subs efficient killers, capable of stalking and sinking their prey even in a challenging anti-submarine warfare environment. KYLE MIZOKAMI READ MORE