Originally Posted by Limey Linda
Update: just found out that if you purchase Google Earth Plus for $20.00 per year you can use the GPS feature which allows you to upload waypoints etc. into your custom chart ( currently only Garmin and Eagle supported but more on the way) Compared with spending $1000 on a chartplotter/chart combo that is not accurate; this is going to be the way to go for me. If my handheld GPS fails then I still have a chart to use for dead reckoning navigation.
i use google earth for 4X4 off roading - laptop gps system, and all i can say is that google earth is VERY accurate.
sonar/chart plotters give the under water data that you can't get from g-earth, depth of water knowledge etc...
edit, there is one major disadvantage with g-earth, which is you can't up load from it, the g-earth system is only a download one way