What You Need to Know: The Swedish Navy's Gotland-class submarine, built between 1992 and 1996, revolutionized diesel-electric submarines with its Stirling engine air-independent propulsion (AIP) ...

Here's What You Need to Remember: Saab says that all of Sweden’s submarines use Saab’s Sterling AIP engine technology. The U.S. Navy made a good decision in evaluating the Swede’s AIP—and hopefully ...

The Gotland-class has a number of features that are optimized for a minimal acoustic signature. A lot of the work was done by Saab, which fills quite a few defense tenders for the Swedish military.