Should a Federal Judge be allowed to prevent the U.S. Navy from using active sonar off the California coast?

A Federal Judge ruled today that the U.S. Navy can not use active sonar in their military exercises off the coast of California. Animal rights activists and environmentalist groups, particularly the NRDC brought a lawsuit against the U.S. Navy on behalf of an attempt to save whales. The NRDC claims that active sonar causes whales to beach themselves, thus, killing the whales. However, the NRDC's own website states that beached whales have been reported to experience "emboli or bubbles in their organ tissues" much like that of a diver experiencing the "bends". Sonar has not been proven to cause emboli, but deep dives have! Could the whales be diving too deep, thus, not being able to get back to the surface, and suffering from disorientation, blackouts, and possibly strokes, or brain hemorhages causing them to be washed ashore? Until sonar is connected somehow with causing the "bends", how can these activist judges stop the Navy from practicing their maneuvers?