German activist Daniel Rawer attempts to record the sound of the underwater cannons. Seismic testing uses sound waves generated by air cannons to create detailed maps of undersea areas, to determine locations for oil drilling. This kind of activity has significant impacts on whales and other wildlife in the area. Underwater sound level over 180-190 decibels is dangerous for marine mammals: if they are within 450-500 metres of the air cannons (190 dB) they will lose their hearing permanently.
© Will Rose / Greenpeace