Electronic charting has changed since it was first created, and with integration with GPS navigation systems, you can now stay on course easily.
Electronic charts are created by a computer running special charting software using digitized chart data on a CD-ROM (e-charts). Nautical Data International (NDI) has exclusive rights to the electronic form of the Canadian navigation charts. Different companies sell charting software, which must be compatible with the e-charts you plan to use. Most boaters will be interested in the raster version of the charts. This software can be used by boaters, hikers, snowmobilers, or anyone who needs to find their way.
In addition, you may wish to connect the computer to your GPS (Global Positioning System) for expanded capabilities. You will be able to see your position on the chart, and the software will automatically scroll the "chart" as you cruise. If you set off-course alarms, or hazard alarms, the screen will also display information to help you bet back on track.
CD-ROMs start at about the same cost as a paper chart. A special Newfoundland Flotilla chart set covers Toronto to Newfoundland. CD-ROMs for Atlantic, Pacific, and Central regions each containing multiple charts. Each CD contains a viewer to see the charts. NDI site at www.digitalocean.ca.
In the USA, Raster Navigational Charts (RNCs™) are official nautical paper charts in raster format that are free to download from the National Oceanic and Atmospheric Administration - NOAA. (Government Index)
Geo-referencing enables a navigation system that is connected to a GPS to locate and display in the chart image on screen the vessel's exact position.
Raster Chart Display Systems (RCDS) are computer-based navigation systems which use raster nautical charts and electronic positioning to provide an integrated navigational tool. In the USA, the National NOAA's Raster Navigational Charts (RNCs™) - official nautical paper charts in raster format (good for computer screens, free to download). Geo-referencing enables a navigation system that is connected to a GPS to locate and display in the chart image on screen the vessel's exact position.