Coast Guard Cutter Healy crew members and scientists deploy an oceanographic pump designed to filter trace elements from seawater, Sept. 2, 2015. 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)