A reader asked me, "how can I use Google Maps to help plan my summer sailing trip". Well, there are several ways, but the one that I think is probably most interesting, is to build your own personal map. This is done by clicking on the "My Maps" tab. From there, you can annotate a Google Maps. These maps can be public or private.
Here's my feeble attempt to illustrate a brief cruise from Greenwich, CT to Martha's Vineyard. (I'm sure you can be more creative). (will show more about My Maps later. It's a great new feature.)