C-MAP strengthens Great Lakes and coastal coverage with latest update

C-MAP app now available with crowd-sourced Genesis layer © C-MAP

C-MAP®, a leader in digital marine cartography and cloud-based mapping, has announced coverage improvements for the Americas, delivering significant enhancements for recreational boaters and anglers across North America.

As boaters prepare to make the most of the Independence Day holiday on the water, this latest release introduces high-resolution detail across key coastal and inland destinations. From the expansive waters of the Great Lakes to detailed updates along the U.S. East Coast, C-MAP continues to enhance coverage and remove barriers to exploration.

"We're excited to bring this latest update to our C-MAP users across the Americas," said Jakob Svensson, C-MAP Product Manager. "The scope of improvements—from major Great Lakes refinements to hundreds of inland water updates—reflects our ongoing commitment to helping boaters navigate with greater accuracy and confidence."

Key updates include:

Great Lakes enhancements:

• Lake Michigan, with notable improvements around Washington Island, Rowleys Bay, and the Winnetka area, alongside extensive broader coverage enhancements
• Lake Huron, with detailed updates in the Thunder Bay region

Coastal improvements:

• Enhanced coverage near Chesapeake Bay
• Updates across Massachusetts coastal waters, including Nantucket Sound

Inland water coverage:

• 278 lakes updated across the Americas, including:
• 249 lakes in Massachusetts, significantly expanding local detail and usability
• 61 newly added lakes, broadening overall coverage

Shaded Relief and Satellite imagery are exclusive to C-MAP Reveal and Reveal X and are available on a range of chartplotters from the Lowrance®, Simrad® & B&G® brands.

These updates are available to both new users and existing consumers who purchased a chart within the past year and maintain an active C-MAP subscription. To explore the latest chart data for your area, visit c-map.com/chartexplorer.