Garmin BlueChart g2 Vision New York Salt/Freshwater microSD Card Realistic navigation features showing everything from shaded depth contours and coastlines to spot soundings, navaids, port plans, wrecks, obstructions, intertidal zones, restricted areas, IALA symbols and more Smooth display presentation including seamless transitioning between zoom levels and more continuity across chart boundaries Safety shading allows user to enable contour shading for all depth contours shallower than user-defined safe depth Fishing charts to help scope out bottom contours and depth soundings with less visual clutter on the display. Includes high-resolution satellite imagery, aerial reference photography, MarinerEye 3-D view, FishEye 3-D view and Auto Guidance technology. Also compatible with Garmin's HomePort software.