If you're buried under an avalanche, every minute counts. Luckily, these days, everyone has their smartphones with them at all times. That's why Sweden's KTH Royal Institute of Technology developed an app that makes it possible for skiers to find people buried in the snow.
The app turns a smartphone into a transceiver. All the trapped skier has to do is launch the app and press a button to activate a distress call. Nearby skiers, who have their smartphones with the app, can zero in on the trapped skier's location. The positioning process operates more quickly when several people are searching at the same time, since phones in the vicinity can exchange information. Each phone creates its own picture of where the avalanche victim is and the system provides clear instructions to guide them to the buried skier.
The app is now being tested, and future applications may include its use in public places, such as shopping malls and amusement parks.