Sensible people might prefer to flee at torpedo-like speeds from a great white sharks, but there's one job in Australia that pays you to race towards the predators. And when you reach the big fish, you have to fix a tracker to its dorsal fin while bobbing in a boat on the ocean swell.

The job is key to a sophisticated protection network that lets swimmers, surfers and fishers check for the aquatic hunters in real time when they venture into the water.

Every day, workers lay 305 satellite-linked buoys at popular spots in waters up to 15 meters (50 feet) deep along the coastline of New South Wales as part of the state-run programme.

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The so-called smart drumlines have baited hooks and when a sha

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