The Navman Fishfinder 4200 is part of a line of electronics specifically designed for boats under 40 feet, yet offers plenty of features. The display on the 4200 offers four levels of grayscale and features readouts for speed, depth, temperature and engine hours. The unit has a dedicated split screen, 100x zoom capability and uses 150w RMS output power to reach depths of 600 feet. The Fishfinder 4200 can also display Navman's digital fuel computer with an optional fuel kit. The Navman Fishfinder 4200 starts at $179.95. Navman USA, Nashua, NH; (866) 628-6261; www.navman.com.