The Supreme Court has ruled that the Navy does not have to curtail sonar use due to whales. It was a 5-4 decision but two of the dissenter's did largely side with the majority. The policy might not stand unchanged long though, the new administration definitely appears to be much more 'enviroment-friendly'. I doubt there would be a wholesale ban or severe restrictions, it is too important an issue to the Navy leadership (and DoD leadership too) and they will puch back hard on too much, but possibly some new rules and restricitons.
http://www.abcnews.go.com/TheLaw/SCOTUS/story?id=6237114&page=1
http://www.abcnews.go.com/TheLaw/SCOTUS/story?id=6237114&page=1