Concerning the acoustic buoys, we think they should not even be used for closing areas unless there is visual or aerial observation of the whales. All the acoustic buoy does is hear the sounds within a 40 kilometre radius. The department then closes around the buoy.
The other problem, which is even worse, is that the department closes the area based on the sound from the buoy, but does not open it based on the sound from the buoy.
Obviously, if they want to continue using the acoustic buoys, then at a minimum, the sound of the whales has to be used to open and close areas.