Coast Guard Cutter Healy motors through a marginal ice zone (MIZ), the transitional area between solid sea ice and open water, Sept. 26, 2015, while underway in the Arctic Ocean. Healy is underway in the Arctic Ocean in support of the National Science Foundation-funded Arctic Geotraces, part of an international effort to study the distribution of trace elements in the world's oceans. (U.S. Coast Guard photo by Petty Officer 2nd Class Cory J. Mendenhall)