"We look for 'trip wires', or things that can suggest something untoward with the vessel," Lieutenant Commander Glynn said.
"These can include things like ladders, weapons, lots of people or skiffs. We'll check what's on board and then make sure we fly outside the 'threat band'."
One of the crew takes photos of the fishing boats, quickly flicking through the pictures as he crouches on the floor of the helicopter, searching for anything suspicious. If need be, the [HMAS ] Stuart will then change course to intercept the boat.
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