Equipment Operator 1st Class Peter Bonebakker from Naval Mobile Construction Battalion 3 operates an excavator at Dozer Field. Members of Naval Construction Group 1 and NMCB 3 operated excavators, dump trucks, field graters and bull dozers during a study to determine if a new hydraulic fluid could help reduce emissions. (U.S. Navy photo by Mass Communication Specialist 1st Class Chris Fahey, NMCB 3 Public Affairs/Released)