On 12 Jul, 22:40, Larry wrote:
http://earthnc.com/

Nautical Charts of the whole continent plus a lot more....uses Google Earth
coupled to your GPS data.....$50!

Take a look at the video....

The days of the $2000 proprietary chart plotter ripoff is ending...

...right on your laptop or handheld tablet.

Check this out, NOAA charts overlaid on Goggle Earth. Note:
Transparency adjustments in upper right.

http://demo.geogarage.com/noaa/