Sweden Develops First-Ever Stealth Ships

Do not mess with the Swedish Navy. By the end of this year, the country will put into service the world’s first two stealth corvettes. Instead of typical propellers, these Visby-class ships use waterjet propulsion, which draws water from under the boat and spits it out the back. That, combined with a non-magnetic hull made of flat surfaces and sharp edges, renders the ships electronically invisible at more than 13 km (0.8 8 miles) in rough waters and more than 22 km (1.37 13.7 miles) in calm conditions. The Swedes started working on the project more than 20 years ago, when the country saw a rash of submarines snooping around in their waters. Those subs better think twice now or they’ll never see what hit ‘em. [Naval-Technology via Gizmodo]