Södermanland-class submarine
Class of ship
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The Swedish Södermanland class of diesel-electric submarines consists of HSwMS Södermanland and HSwMS Östergötland. These two submarines were originally launched as Västergötland-class submarines in 1987 and 1990, and were relaunched as a new... Wikipedia
Propulsion: 2 × Hedemora Diesel-electric engines; 2 × Kockums v4-275R Stirling AIP units