Garmin 010-10680-50 Blue Chart User's Guide - Page 14

Getting Paper-Chart-Specific Information BlueChart cartography also provides paper-chart-specific information, such as chart publisher, print date, edition date, NTM (Notice to Mariners) correction date, and scale. Additional notes are available for the paper charts. To display paper chart-specific information on your Garmin unit: Place the unit's cursor on an open area of the chart, and press ENTER. A window displays the chart information and allows you to view additional notes about the chart area. BlueChart electronic map detail is presented on a chart-by-chart basis. By providing paper chart-specific information, you can know exactly from which chart and scale each displayed feature is digitized. BlueChart electronic charts are a faithful reproduction of the published official paper charts that mariners are required to carry. BlueChart data is not seamless. Just like the paper charts from which the data is derived, you might observe some discontinuity along chart borders, both on your Garmin unit and on your PC screen in MapSource. For example, if a contour is present on one chart, and not on the adjacent chart, the BlueChart data is represented on your Garmin unit or PC screen the same way. Likewise, if adjacent paper charts that generate BlueChart data are of different scales, you might encounter shaded areas on the Garmin unit. This can occur at any zoom level and can be easily remedied by zooming out one or two scale levels on the Garmin unit.  BlueChart User's Guide