We are working very closely with Department of Fisheries and Oceans scientists and various scientists who are doing work internationally in the International Maritime Organization to look at the noise impacts from shipping.
What is really important to understand is the very interrelated nature of these threats. It's not noise from shipping in and of itself that is potentially damaging. In the case of the Pacific coast for the southern resident killer whale, it's an interplay of limited prey and contaminants and shipping noise, and the science is ongoing to look at that. Each type of vessel has a different impact as well. For example, ferries have a certain noise signature that is higher if they slow down.
A lot of work is happening around understanding both the impacts on marine mammals and the nature of the shipping noise itself, so that we can make appropriate regulation as we go forward.