It almost feels like science fiction: a 28-foot long, 2,200-pound robotic submarine that can fit through a 30-inch ice borehole. But observers in Tahoe this past week can attest to the realness — and world-class engineering — of the Sub-Ice Rover (SIR) created by DOER Marine of Alameda for North Illinois University. The craft is designed to explore the ocean underneath the half mile of frozen water known as the Ross Ice Shelf in Antarctica. To clear the borehole, SIR is designed to collapse to a diameter less than 30 inches. 

Once beneath the ice, SIR expands and produces an array of high tech sensors and cameras which blast terabytes of data up the 2-mile cable to the control center. These instruments will ultimately seek to collect data about ice melt beneath the Ross Ice Shelf to better understand conditions at the interface between seawater and the base of the glacial ice, as well as investigate the sea floor and layers of sediment beneath. …