Alvin Mar, a systems engineer for Lockheed-Martin, operates Mobile User Objective System satellite communication software aboard the Coast Guard Cutter Healy while underway near Alaska, Aug. 10, 2014. MUOS is a narrowband tactical satellite communications system that is being tested for use in the high latitudes of the Arctic. (U.S. Coast Guard photo by Petty Officer 1st Class Shawn Eggert)