HotMaps Handheld includes 3000 of the most popular US lake maps for recreational fishing and boating. Great for kayaking, canoeing, ice fishing, and more! HotMaps Handheld lake maps provide 16 crystal clear zoom levels and easy to read detail including bottom contours, drop-offs, structure, vegetation, boat ramps, marinas, navaids and more! Available on pre-programmed SD (SecureDigital) media cards compatible with Lowrance, Humminbird, and Furuno SD GPS units.