The Gotland-class, to be fair, is not exactly a well-known submarine outside of naval circles. However, this submarine made some serious history when it took on the US Navy in a simulation and did the unthinkable. A few months back, the Swedish Defense Material Administration (FMV) announced that it had awarded a mid-life upgrade (MLU) contract to Saab for the Gotland-class submarine HMS Halland. Under the upgrade project, which is reportedly valued at $116.75 million, Saab will carry out modernization and modification work on the submarine – during which time the boat’s existing combat systems will also undergo an overhaul.