Because David Rogers likes to go fast in a good, strong breeze, he took a sailing course in college. And because it was where the classes were held, he hung out at Charleston City Marina. So when it became time for a summer job, he simply asked the people he knew, and he was hired. Now he’s harbormaster of the marina in charge of 40 acres of water, 425 slips and the 1,530-foot MegaDock fueling station.