They gathered on the dock in the Port Du Cadiz in the south of Spain: three archeologists, two college students, three captains, one cook, one engineer, two scuba divers, one able-bodied seaman and Laurie Zaleski, a marine geologist, who had just signed up for the adventure of a lifetime. The 2004 months-long mission to locate a pair of 200-year-old shipwrecks using multibeam sonar was among the first of its kind. And they were sailing, quite literally, into uncharted waters.