ARCTIC OCEAN – A group of scientists and engineers deploy an ice tethered profiler on the Arctic ice Sunday, Sept. 30, 2018, about 350 miles northeast of Barrow, Alaska. The profiler is a device that moves up and down a cable below the ice surface and measures temperature, salinity, depth and current. The U.S. Coast Guard Cutter Healy (WAGB-20) is underway in the Arctic with about 100 crew members and 30 scientists to deploy sensors and semi-autonomous submarines to study stratified ocean dynamics and how environmental factors affect the water below the ice surface for the Office of Naval Research. The Healy, which is homeported in Seattle, is one of two ice breakers in U.S. service and is the only military ship dedicated to conducting research in the Arctic. (NyxoLyno Cangemi/U.S. Coast Guard)