| Sonar is a method for detecting
objects by bouncing sound waves off of them and then listening for
echoes. Submarines use sonar in order to steer around obstacles
and avoid hitting fish and other submarines. A sonar device sends a
narrow beam of sound into the water. If the beam hits something, it
bounces back and is caught in a sonar dish that enhances the sound and
calculates how far away and how big the object is that caused the beam to
bounce.
Auxiliary coastguard and Drumnadrochit businessman
George Edwards detected a cavern 812 feet deep in Loch Ness. He
believes this cavern may lead to a network of caves where Nessie and her
family could live out of sight of most detecting devices. The picture
above shows the sonar image of this cavern, now known as Edwards' Deep. |
