Petty Officer 2nd Class Grant Barsuhn, a duty technician at the Electronic Systems Support Detachment in Milwaukee, replaces a cable penetrator for the transducer on a 25-foot Response Boat-Small operated by the boat crews of Coast Guard Station Wilmette Harbor, Ill., at the station, July 30, 2013. The cable penetrator forms a watertight seal for wires leading to the boat's electronic systems from the transducer located between the outboard engines, which measures water depth. (U.S. Coast Guard photo by Jonathan Roth)