CHEBOYGAN, Mich. - Coast Guard Lt. j.g. Matthew A. Smith holds his promotion certificate and poses for a picture with Cmdr. Michael Davanzo, commanding officer of Coast Guard Cutter Mackinaw, following Smith's promotion from ensign to lieutenant junior grade June 11, 2012 aboard Mackinaw at the ship's homeport of Cheboygan, Mich.Smith, a native of Kountze, Texas, is a deck watch officer aboard the Mackinaw, the Coast Guard's only 240-foot seagoing buoy tender/icebreaker. U.S. Coast Guard photo courtesy of Coast Guard Cutter Mackinaw.