Furuno's new dual-frequency plotter/fish finders — GP1670F (5.7-inch display) and GP1870F (7-inch wide-format screen) — feature the company's new Bottom Discrimination, Accu-Fish and Post-Processing Gain technologies. The first offers a graphic display of the seafloor characteristics with a probability curve in mixed-bottom areas; the second estimates the size of fish below the boat; and the latter adjusts gain throughout the entire screen for better historical review. The plotter shows short- and long-range views in a split-screen presentation. The units come with C-Map 4-D cartography, and cost $1,195 and $1,495. Call 360-834-9300 or visit furunousa.com.