Josh Jones (right), graduate student researcher at Scripps Institution of Oceanography in San Diego, California, teaches Coast Guard Chief Warrant Officer Robert Nendza to read a conductivity temperature depth (CTD) probe aboard Cutter Maple about 90 miles northwest of Barrow, Alaska, July 23, 2017. The Coast Guard assisted Jones with using the device to measure physical attributes of the Arctic Ocean including salinity and temperature, at various specified depths. (U.S. Coast Guard photo by Petty Officer 2nd Class Nate Littlejohn/Released)