When Julian Duff shows up for work he’s not exactly sure what will happen. On a routine day he may be called upon to fly a passenger charter flight or some freight. More interesting missions might be spotting prawns or taking passengers to a resort on the Great Barrier Reef. And then there’s the school runs and the cabin full of live giant crayfish. Duff is a pilot for East Air, a charter operator based in Cairns, Queensland, Australia. The company’s location near the Great Barrier Reef, close to fertile fishing grounds, and within an easy flight to the Australian bush provide a setting for a variety of unique jobs. All of which are served by a fleet of 500S…