Satellite photos used to be for military eyes only, but Google Earth changed all that. Now something similar is happening to the ocean depths, with any web user able to listen in and "surf the sea floor" - and the US Navy is not happy."The cable is going underneath here," says Benoit Pirenne, standing at the water's edge on Canada's Vancouver Island. "It's going out 500 miles (800km) in a big loop in the ocean, coming back in the same place." The Vancouver cable connects a network of scientific instruments on the floor of the north Pacific, some as deep...