SAN FRANCISCO – In a unanimous rebuke, the Ninth Circuit court ruled Friday that the National Marine Fisheries Service (NMFS) had illegally approved a permit authorizing the Navy to use its high-intensity long-range sonar – called low-frequency active sonar (or LFA) – in more than 70 percent of the world’s oceans. Designed for submarine detection over vast expanses of deep sea, LFA has the capacity to expose thousands of square miles – and everything in it – to dangerous levels of noise.

The case against the Fisheries Service was brought by the Natural Resources Defense Council (NRDC), The Humane Society of the United States, Cetacean Society International, League for Coastal Protection, Ocean Futures Society and its President Jean-Michel Cousteau, and Michael Stocker, a bioacoustician and director of…