CNN CNN Newsroom December 5, 2013 19:24:00
Banging under the pipes underwater to starling them and move them. >> really, pipes? >> im sorry? >> really, pipe snz. >> indeed, the whales are sensitive to sound, so the revving engines and also aluminum pipes they can bang in the water can help create a wall of sound that can drive the whales in a specific direction. i know thats one of the techniques they have been employing, and working hard to try to get the whales as quickly as possible back to deep water. its positive. things are certain...
Source: archive.org