MapSend BlueNav CD North America includes 83 local North America navigational charts, offering a complete range of detailed marine cartography for your Magellan Meridian Gold, Marine,Platinum and Color or Magellan SporTrak Pro, SporTrak Pro Marine and SporTrak Color. Derived from Navionics Gold charts, MapSend BlueNav charts are the most advanced marine cartography available, providing large, highly detailed coverage areas andenhanced marine navigation information, including marine currents, tides, port services and much more. In order to download charts to your unit the product must be activated. Once your CD is activated, MapSend BlueNav charts can be uploadedfrom your computer to a Secure Digital (SD) memory card for use with your Magellan Meridian GPS receiver or directly to the built-in memory of your SporTrak Pro GPS receiver. This MapSend BlueNav CD North America is ideal for mariners who wish to utilizea large number of charts interchangeably by over-writing new charts for each new journey.Each of the 83 local charts provides the information and features you need to ensure safe and enjoyable navigation in the areas you travel.