Garmin BlueChart® g3 Vision® HD - VUS020R - St. Lawrence Seaway - microSD™/SD™

The Garmin BlueChart g3 Vision HD VUS020R for the St. Lawrence Seaway is a high-resolution marine navigation chart designed for serious boaters, charter captains, and commercial operators navigating eastern North American waterways. Delivered on microSD/SD card format, this chart provides detailed bathymetric data, bottom composition, and structure information across one of North America's most heavily trafficked shipping corridors and recreational fishing regions.

Coverage spans the St. Lawrence River from Brockville, Ontario to Sept-Îles, Quebec, including the metropolitan Montreal and Quebec City regions. The chart also provides detailed coverage of Lake Champlain and Lac Saint-Jean, plus the Rideau River, Ottawa River to Temiscaming, Rivière Saguenay from Chicoutimi to the St. Lawrence confluence, and the Hudson River south to Troy, New York. This breadth of coverage is critical for operators transiting between the Great Lakes system and Atlantic waters, where navigation hazards, tidal effects, and vessel traffic demand precise charting. Vision HD technology delivers photo-realistic satellite imagery overlaid with Garmin's proprietary sonar-derived bathymetry, enabling operators to identify structure and bottom conditions that influence fish behavior and safe passage.

This chart is built for weekend anglers targeting walleye and smallmouth bass on Lake Champlain, commercial shipping operations on the St. Lawrence, and recreational boaters navigating the Hudson River estuary. The microSD/SD card format is universally compatible with modern Garmin GPS chartplotters, GPSMAP handhelds, and legacy marine devices, making it a cost-effective upgrade path for existing navigation systems. Freshwater tidal zones, lock and dam locations, and seaway shipping lanes are clearly marked—essential intelligence for safe transit and regulatory compliance in these heavily regulated waterways.