This is two years old - I'll have to see if it has been updated:
This group sponsors high school scholars:
CENS: Center for Embedded Networked Sensing
And here's one of their associated projects, using Google Earth and multiple sensors, webcams, and overlays.
James Reserve - Data Management Systems
Then there's this page of hundreds of maritime maps using Google Maps, and Google Earth:
Google Ocean : marine data for Google Maps / Google Earth
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