''We locate objects on the sea bed with a side-scan sonar device which we tow along behind our salvage ship, '' she explained.

BBC: Hunting for Cuba's hidden treasure

The group used a sonar device to scan the depths.

BBC: Searching Lake Garda for WWII missing

Players shoot their way through a gory post-apocalyptic landscape with the help of the new Wii U's tablet-controller hybrid, called the GamePad, whose onboard screen and buttons can be manipulated to act as a sonar device to find oncoming bad guys, among other things.

WSJ: Nintendo Targets Intense Action With Next Wii