ARABIAN GULF, Sept. 3 -- Chief Machinery Technician Chuck Bratcher, of Big Fork, Mont., assists with the vibration signature analysis in the engine room of Coast Guard Cutter Wrangell, underway in the Arabian Gulf, Sept. 3, 2003. The analysis is used to check the overall condition of the main diesel engines by mapping the vibrations at various segments. The analysis will be completed aboard all four 110-foot patrol boats assigned to U.S. Coast Guard Patrol Forces Southwest Asia, deployed to the Arabian Gulf in support of Operation Iraqi Freedom. USCG photo by PA3 Kyle Niemi