Navies use undersea drone as sub warfare training target

Saab -- yes, Saab -- has built an amphibious drone meant to keep submarine crews on their toes.

The Saab AUV62 is a highly sophisticated autonomous underwater vehicle that mimics a submarine, allowing navies to train for anti-submarine warfare as realistically as possible without blowing up expensive submarines.

Though it's an unmanned vehicle, the AUV62's unique acoustic payload means it will show up on sonar screens as an enemy sub. It's essentially the underwater equivalent of skeet shooting, except with torpedoes.

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