As the result of a NRDC lawsuit, a federal judge yesterday ordered the Navy to adopt measures for protecting marine mammals during midfrequency sonar exercises off San Diego County and other parts of Southern California. I wrote about the previous decision to overturn lowfrequency sonar use by the Navy in The Skeptic in 2004 in an article titled Sonar Ban Sounded Good. Pursuing a ban on midfrequency sonar is certainly a step up from pursuing a ban on lowfrequency--almost every navy boat in the world has midfrequency sonar and uses it regularly.
The ban is great news for acoustic feeders off the California coast, but given the many other navy and fishing boats with midfrequency sonar, seismic exploration, and ocean shipping, this ruling chips away at only the tip of the noise pollution iceberg. Listen to Cornell University bioacoustician Chris Clark discuss how noise pollution affects right whale survival on the East Coast at NPR.
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Like you said, it's a good start. Now let's move some of that protection up north to the rest of the coast! I agree with one of the people cited in the article that having spotters isn't likely to catch many of the impacted species. I'll be interested to see how much the Navy is able to move around this ruling in the name of national security.