The Navman Fishfinder 4150 offers plenty of features in a package designed for boats under 40 feet. The monochrome, 4.4" diagonal display has a white-line bottom indicator and shows water temperature, speed and engine hours. The 4150 has 150w RMS output power and can reach depths of 600'. The unit has depth, fish and battery alarms and 16 levels of variable amber backlighting. The Navman Fishfinder 4150 starts at $149.95. Navman USA, Nashua, NH; (866) 628-6261; www.navman.com.