GVO Marine Electronics: We provide reliable, safe online shopping 24 hours a day, 7 days a week throughout the U.S. and the world. We are strongly committed to providing our customers with top quality merchandise and world class service. Model 30411 BlueChart g3 Vision HD - VUS515L - Brownsville - Key Largo - microSD?/SD? Coverage: Detailed coverage of the Gulf of Mexico from Brownsville, TX to Plantation Key, FL including Corpus Christi, TX, Matagorda Bay, Galveston Bay, Port Arthur, TX, Atchafalaya Bay, the Mississippi Delta, Chandeleur Islands, Tampa Bay and the Florida Keys west of Key Largo. Also includes Lake Ponchartrain and Lake Maurepas to Vermilion Bay and Lake Calcasieu. Bathymetric coverage of offshore features from Vernon Basin to Alaminos Canyon including DeSoto Canyon, Mississippi Canyon and Green Canyon. Premier Coastal Navigation Charts Provides industry-leading coverage, clarity and detail with updated coastal charts that feature integrated Garmin and Navionics data Auto Guidance technology uses your desired depth and overhead clearance to calculate routes and show a suggested path to follow High-resolution relief shading combines color and shadow to give you an easy-to-interpret, clearer view of bottom structure than contour lines alone Depth Range Shading provides up to 10 depth ranges, enabling you to view your target depth at a glance Up to 1? contours provide a more accurate depiction of the bottom structure for improved fishing charts and navigation in swamps, canals and marinas Experience unparalleled coverage and brilliant detail on the water. BlueChart g3 Vision coastal charts provide industry-leading coverage, clarity and detail with integrated Garmin and Navionics data, Auto Guidance technology and high-resolution relief shading.. Auto Guidance Technology The Auto Guidance feature uses your desired depth and overhead clearance to calculate a route and a suggested path to follow. High-resolution Relief Shading Feature High-resolution relief shading combines color and shadow to give you an easy-to-interpret, clearer view of bottom structure than contour lines alone. Up to 1? Contours The closer the contour lines, the more accurate the depiction of the bottom structure for improved fishing charts and navigation in swamps, canals and marinas. NOAA Raster Cartography If you prefer your display to have the look of paper charts, NOAA raster cartography2 is available as a free downloadable feature via the ActiveCaptain app. Depth Range Shading This feature provides up to 10 depth ranges, enabling you to view your target depth at a glance. Shallow Water Shading This feature allows you to use shading to designate the shallow water depths you need to avoid. High-resolution Satellite Imagery These detailed images of ports, marinas, bridges and navigational landmarks help provide you with superior situational awareness. Unique 3-D Views MarinerEye and FishEye views provide additional perspective both above and below the water line. Auto Guidance is for planning purposes only and does not replace safe navigation operations Raster cartography cannot be viewed on echoMAP CHIRP and ECHOMAP Plus combos but can be viewed on mobile devices via the ActiveCaptain mobile app This product may not be returned to the original point of purchase. Please Contact Garmin directly with any issues or conderns. GVO Marine Electronics: . Get the item you ordered or get your money back. Covers your purchase price and original shipping.