Slashdot Mirror
Navy Sued for Sonar-Blasting Whales
An anonymous reader wrote to mention a CNN report about a suit brought against the U.S. Navy for sonar pollution. From the article: "The environmentalists want the Navy to use harmless passive sonar -- listening for sounds made by marine mammals themselves -- to locate the animals before using mid-frequency sonar. They also want the Navy to avoid migration and calving areas and to turn on sonar systems gradually so that the animals have time to flee."
They are obviously not aware of the Navy's latest plans to use high intensity soundwaves to destroy incoming torpedos
No, it's more like telling radio and microwave tower operators to use white blinking lights instead of red ones because the red ones interfere with bird migration (really -- they do).
This sort of thing does not interfere with any sort of economic well-being, nor does it require a significant cost up front, like your analogy presumes.
Per Square Mile, a blog about density
Let me start by saying I'm a retired Sonar technician. I spent 20 years in the US Navy working on various Sonar systems. Never mind the fact active Sonar is the best way to catch a diesel powered submarine. Never mind the fact almost every country in the world has diesel submarines, including Iran. Lets just focus on whether or not Sonar hurts marine mammals. The Navy has been using Sonar for over 50 years and there hasn't been a mass extinction of marine mammals due to Sonar. If you believe the environmentalists and then consider the number of ship's that have been blasting sonar into the ocean in the vicinity of San Diego, CA and Norfolk, VA, the natural assumption would be massive marine mammal deaths in those areas. Guess what? It hasn't happened. In fact, one of the joys of my job was the listening to the dolphins that were attracted by the Sonar. They certainly didn't appear stressed. The Navy has spent millions of dollars trying to determine if Sonar hurts marine mammals. The Navy already complies with most of the environmentalist requests just in case Sonar "might" hurt a marine mammal. I was personally involved in an investigation over the death of a dozen beak whales off of the Canary islands. There was 5 Spanish ships and 1 US ship. The Spanish ships were closer to shore than the US ship. Guess who got blamed for these whales beaching themselves? In the end, it was determined the whales beached themselves trying to get away from the shipping traffic, not the Sonar. The Spanish ships sonar operate in the same frequency range as the US. Since these ships transmit in this area on a regular basis and there have been no mass deaths of beak whales Sonar was absolved of the cause. There still has been no definitive proof after 50 years. If you want to protect marine mammals, go after the industries that regularly dump trash and industrial waste. Have whales beached themselves? Yes! Does anyone know why? No! "Hmmm look around...oh yeah! The Navy has money, lets sue them for research dollars!" It's a frivolous lawsuit by a bunch of folks that have nothing better to do than hate their own government.
I can say that, after spending 10 years as a sonar tech on a surface ship in the US Navy, there are a lot of people writing a lot here about something that they don't know much about - and pretty much getting it wrong. Even in littoral waters, passive sonar is an effective asset, but for a final targeting solution, nothing beats the accuracy of active sonar.
Subs tend to not use active sonar for what ought to be obvious reasons. Surface ships don't use it as a primary sensor because it's relatively easy for the target to hide below the thermal layer. Even aviation assets don't use it for the number one reason that everyone else doesn't use it: once you ping the enemy, they know that you're coming.
But, once you've made the decision to attack, you've got to have a very accurate fix on the target. Active sonar does that. Active sonar is the sensor of last resort - once you start pinging, you've given away the fact that you know where the enemy is - and the enemy knows that, too. No ship, submarine or aircraft in any Navy cruises around with their active sonar blaring away - number one, it's like waving a big old flag saying "here I am" and number two, it's about impossible to sleep through if your berthing area is below decks. You won't go deaf, but you won't sleep, either.
Also, just as anectodal evidence, when we participated in exercises off of the Bahamas and Florida, we never suffered a dearth of dolphins swimming with the ship, even when we were actively pinging a target. The sonar would be going off like crazy and the dolphins would stay right with the bow of the ship. And in the Gulf of Oman, there didn't seem to be any shortage of whales, either, even though there were destroyers alongside of a repair tender operating low and mid frequency active sonar for maintenance.
So don't get the idea that the Navy is out there pounding the water with sonar - they're not. And based on what I've seen and read, I'm not even close to being convinced that sonar is negatively affecting the cetacean population.
-h-