Zoom Range of Plotter Charts, Navionics Boating App and Chart Viewer

The Navionics® plotter charts are created in accordance to the scale range of the government charts. In the ports and harbors there are large scaled charts (charts that are in the 1:1 / 1:79,999 scale range). Closer to shore, where there are numerous large scaled charts available, the zoom will be in the 1/8, 1/4 and 1/2 NM zoom range. Offshore there are only small scaled charts (charts that are in the 1:80,000 / 1:499,999 scale range) so the zoom range will be in the 1, 2NM and higher zoom range.

The Navionics Boating app and the chart viewer are created differently with a constant zoom range of 1/8NM throughout the areas. The Boating app and the viewer do not have a memory limitation of how much data can be added (as the plotter charts do) and do not include the different zoom range limitations. 

When viewing the chart viewer to determine your level of details for plotter cards, keep in mind that the zoom range offshore will be less on the plotter cards than able to be viewed on the viewer. This does not mean that there are more details on the viewer/Boating app, simply that the zoom capabilities are higher.