The Supreme Court (Winter v. Natural Resources Defense Council) voted 5-4 to rescind bans on sonar use in training exercises off the California coast. Those bans were implemented by lower federal courts. The ruling states that the lower courts exceeded their authority in those actions.

The bans were in place presumably to protect sea life from the negative effects of sonar use… effects that have been researched by organizations like the National Resources Defense Council (NRDC). I can not speak directly to the integrity of the research, but it seems the concerns bear consideration. Perhaps not a knee-jerk response, since sonar has been in regular use for decades now, but enough careful consideration that if sea life is truly being impacted, specifically by excessive noise (and sonar is not the only source of noise that is produced by human activities in the ocean), then we can look at appropriate legal imperatives to provide adequate protection without hog-tying the Navy from being adequately prepared for real battles.

The Court was not, in this case, judging [...]