... to fill a liter bottle with ocean water from the middle of the Denmark Strait?
Six. One to steer the sailboat in the correct direction. One to tack the sails, while navigating an icy deck. Two to fish ocean water into a bottle using cordelette and a MacGyvered weighting system. One to take temperatures and comment on how cold it is outside. And, finally, one to document the process while laughing at the slightly dysfunctional, yet incredible crew that makes up the Shifting Ice and Changing Tides Expedition.