The Economist explains: "Australia’s selachian battlefield goes digital. AUSTRALIA’S waters are some of the most dangerous in the world. Ignoring, for a moment, the dangers posed by jellyfish and salt-water crocodiles, the average annual number of so-called “unprovoked” shark attacks more than doubled between 1990-2000 and 2005-2015, to 15. One company in Western Australia has a futuristic solution. In December Shark Alert International will try equipping a helicopter and a drone with military-grade cameras that can “x-ray” the water, then send alerts to lifeguards and even surfers’ watches. The technology was originally designed to help America detect a different foe: Russian submarines...

The Economist explains: "Australia’s selachian battlefield goes digital. AUSTRALIA’S waters are some of the most dangerous in the world. Ignoring, for a moment, the dangers posed by jellyfish and salt-water crocodiles, the average annual number of so-called “unprovoked” shark attacks more than doubled between 1990-2000 and 2005-2015, to 15. One company in Western Australia has a futuristic solution. In December Shark Alert International will try equipping a helicopter and a drone with military-grade cameras that can “x-ray” the water, then send alerts to lifeguards and even surfers’ watches. The technology was originally designed to help America detect a different foe: Russian submarines...