Scientific killing

The [method] that is now mostly used is a technique in the Antarctic that uses sonar. Not, however, to look at the whale underneath the water. They use it as a means of scaring [it], because sonar is very loud. They did experiments and chose a frequency which kept whales so panicked, that they were at the surface for breaths more frequently than at other frequencies. So, they drive the whale along at the surface and then they fire into it.

-- Roger Payne in an interview with Yale 360. Payne says that following the 1986 moratorium the total number of whales killed world wide was 185 a year. It has climbed steadily even since, reaching 1,004 by 2009