C-MAP Strengthens Great Lakes and Coastal Coverage with Latest Update

Viareggio, Italy (June 30, 2026) – C-MAP®, a leader in digital marine cartography and cloud-based mapping, today announced coverage improvements for the Americas, delivering significant enhancements for recreational boaters and anglers across North America.

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Chesapeake Bay

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Crawling Valley Reservoir

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Nantucket Sound

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Wachusett Reservoir

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Washington Island

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

About C-MAP®

C-MAP is part of Navico Group, a division of Brunswick Corporation’s (NYSE: BC), and is a leader in digital marine cartography and cloud-based mapping, offering one of the world’s largest marine navigation digital chart databases. C-MAP’s portfolio includes the DISCOVER™, REVEAL™, and 4D™ chart ranges, which integrate with fishfinders and chartplotters from the leading marine electronics brands, and via the C-MAP App available on the App Store and Google Play.

About Navico Group

A division of Brunswick Corporation (NYSE: BC), Navico Group is the world’s leading supplier of integrated systems and products to industries ranging from marine to recreational vehicle and beyond. The Navico Group portfolio is comprised of industry-leading brands in power management, digital control & monitoring, networked devices, and marine electronics. Some of the many brands that make up Navico Group include: Ancor, Attwood, B&G, BEP, Blue Sea Systems, C-Map, CZone, Lenco, Lowrance, Marinco, Mastervolt, MotorGuide, Progressive Industries, ProMariner, RELiON, Simrad, and Whale.