BlueChart g2 Southwest Caribbean - microSD/SD 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 Choice of standard 2-D direct overhead or 3-D "over the bow" map perspective to make chart reading and orientation easier. Also compatible with Garmin's HomePort trip-planning software.