Gotland Class Submarine
The Gotland class submarines of the Swedish Navy are modern diesel-electric submarines, which were designed and built by the Kockums shipyard in Sweden. They are the first submarines in the world to feature a Stirling engine air-independent propulsion (AIP) system, which extends their underwater endurance from a few days to weeks. This capability had previously only been available with nuclear powered submarines.
Read more about Gotland Class Submarine: Features, Units, Deployments
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—Henry David Thoreau (1817–1862)