It's an excellent point.
We are examining everything that we do in the Canadian navy to make sure that we are conscious of the environmental impact. The system you referred to sounds a lot like sonobuoys. As we look at systems like those, we make sure that it is an expendable. It does ultimately sink to the bottom of the ocean. We make sure, to the extent we possibly can, that we minimize the impact on the environment of that and that there is no harm to any of the life in the sea as well.