DESC: Interactive viewing of detailed nautical chart data Features include shading between depth contours, spot soundings, navaids, port plans, wrecks, obstructions, inter-tidal zones, and more Cursor movements over the chart provide descriptions for contour depths, chart number, navaid name, and more Includes information from the paper chart used in the digitization process such as chart number, name, scale, revision date, and Notice-to-Mariners date See product description for compatibility information