After great stuff by Google like: Google Earth and Google Sky; according to a report at news.com, Google is planning to go for mapping Oceans (Google Ocean?) name of the service is not confirmed, it may be changed later on.The report says:

The company has assembled an advisory group of oceanography experts, and in December invited researchers from institutions around the world to the Mountain View, Calif., Googleplex. There, they discussed plans for creating a 3D oceanographic map, according to sources familiar with the matter.

The tool - for now called Google Ocean, the sources say, though that name could change - is expected to be similar to other 3D online mapping applications. People will be able to see the underwater topography, called bathymetry; search for particular spots or attractions; and navigate through the digital environment by zooming and panning.