Fishing Hot Spots has developed one of the most comprehensive structure-map chips for the Great Lakes and all their connecting waterways. Highly detailed contour definition between 3 and 10 ft. help you hone in on your quarry. Mapped points of interest aid in navigation. Structure and vegetation icons over known honeyholes puts you on the fish. Marked facilities and boat ramps for easy off-the-water access. Fisheries information built into the chip has tips and techniques to hook into some trophies, helping you develop productive fishing patterns. Compatible with Lowrance® HDS, Elite, Mark and Endura units; Simrad NSS, NSE and NSO; B&G Zeus units.