(CNN) -- While many teenagers will be focusing on opening presents and eating turkey, this Christmas Day Jessica Watson will be poring over weather maps. After circumnavigating the globe by herself at the age of just 16, it would be easy to presume that a 628-nautical-mile race would not faze the sailor. But the Australian teen is not taking any chances when she enters the Rolex Sydney to Hobart Yacht Race, beginning on December 26. Now aged 18, Watson will skipper the youngest-ever crew in the ocean race. "We've ticked all the boxes", says Watson. "This last week is all about keeping your cool."
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Jessica Watson will skipper the youngest ever crew in this year's Rolex Sydney to Hobart
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Last year, aged 16, she sailed around the world alone
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Watson is 18 years old, with the average age of her crew 19
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They'll take part in the 628-nautical-mile race down the south-east Australian coast
Watson says sailing down to @placeholder and back last month gave them the confidence they need going into the race.