151204-N-SF984-087 PACIFIC OCEAN (Dec. 4, 2015) Engineman 2nd Class Leo Nguyen inspects a fuel oil-duplex filter in an auxiliary machine space aboard Whidbey Island-class dock landing ship USS Rushmore (LSD 47). Rushmore is part of the Essex Amphibious Ready Group and, with the embarked 15th Marine Expeditionary Unit (15th MEU), is currently operating in the U.S. 3rd Fleet area of responsibility. (U.S. Navy photo by Mass Communication Specialist 3rd Class Chelsea Troy Milburn/Released)