The Navman Fish 4600 Fishfinder offers full fishfinder capability integrated with a fuel computer and Mercury's SmartCraft engine-monitoring system. The fishfinder uses a 600-watt transducer to reach depths of 3,300' and has an array of alarms including depth, fish detection, water temperature and battery levels. The Fish 4600 displays all information on a 6.4" high-definition, sunlight-viewable screen. The fuel computer uses speed readings from either the fishfinder or from a connected chart plotter to provide accurate fuel economy and range information for gasoline engines. The unit also interfaces with the Mercury SmartCraft system, allowing users of Mercury, MerCruiser and Cummins engines to view complete engine diagnostics. The Fish 4600 Fishfinder comes with either a transom-mount or through-hull transducer and starts at $899.99. Navman, Nashua, NH; (866) 628-6261; www.navman.com.