YERBA BUENA ISLAND, Calif. - Lt. Cmdr. Thomas C. D'Arcy (left) salutes as he relieves Lt. Cmdr. Roy R. Brubaker (right) as commanding officer of Coast Guard Cutter Aspen, June 14, 2012. The change of command ceremony is a time-honored tradition that formally restates that the continuity of authority of command will be maintained. (U.S. Coast Guard photo by Petty Officer 1st Class Sherri Eng)