If your chartplotter came with built-in BlueChart g3 coastal charts or LakeV g3 inland maps, this plug-in microSD card makes it easy to upgrade to our latest Garmin Navionics+ all-in-one mapping solution. The Garmin Navionics+ Built-in Chart Update Card for U.S. and Coastal Canada includes detailed coverage of the entire U.S. coasts, lakes, rivers, and inland waterways plus Alaska and Hawaii. Canada coverage includes coastal British Columbia, the Great Lakes, the St. Lawrence Seaway, New Brunswick, and Nova Scotia, as well as Bermuda, the Bahamas, Baja California, the Gulf of California, Johnston Atoll, and Palmyra Atoll/Kingman Reef. Works with compatible Garmin chartplotters with built-in charts only