Great Lakes Coverage for LowranceThe most complete and comprehensive coverage of the entire Great Lakes system, Included are detailed contours for all of the Great Lakes as well as connecting waterways (St, Clair River and Niagara River), Complete contour coverage from 3" to 10" intervals, Complete aids to navigation, Extensive fishing information, Thousands of fishing points of interest for the premier and key fishing areas of the great lakes, Covers over 94,000 square miles of water, More than 10,000 miles of detailed shoreline, Thousands of wrecks and reefs, Public boat launch locations, Nearly 1,000 marina locations , Product : FISHING HOT SPOTS PRO GREAT LAKES F/ LOWRANCE, Manufacturer : FISHING HOT SPOTS, Manufacturer Part No : E223, UPC : 071365102234 SKU: CW47345