The last effort to map the lakes came in the 1970s. Maps were largely created using single-beam sonar technology similar to today's commercially available depth- and fish-finders. The system produced maps covering only about 15% of mostly coastal lake bottom, said Tim Kearns, a spokesperson ...
How long can you survive adrift in the ocean? How do torpedo engines work under water? More Great Links Calcio Network: Bismarck Legend Lives California State Lands Commission: California Shipwrecks Learning Lab Denmark: Hazard Cards Minnesota Historical Society: Lake Superior Shipwrecks Sultana WebRing...
The creatures have covered virtually every shipwreck and downed plane in all of the lakes except Lake Superior, archaeologists say. The mussels burrow into wooden vessels, building upon themselves in layers so thick they will eventually crush walls and decks. They also produce acid that can corrode...
The last effort to map the lakes came in the 1970s. Maps were largely created using single-beam sonar technology similar to today's commercially available depth- and fish-finders. The system produced maps covering only about 15% of mostly coastal lake bottom, said Tim Kearns, a spokesperson ...
Another tool is laser imaging, where scientists measure how long it takes for a laser beam fired from a plane to reach an object and bounce back, resulting in three-dimensional imaging of bottom topography. A high-resolution map of the lakebed would offer multiple benefits, said Steven ...