Submarines: Continuous Active Sonar


August 26, 2010: A major problem with ASW (Anti-submarine warfare) is that your submarine detection software equipment is turned off most of the time, and when it is used it requires a lot of trained operators and lawyers (to deal with the growing number of lawsuits filed by NGOs seeking to protect sea animals from noise pollution). Ships depend on intelligence, usually from large organizations like the CIA or military intel operations, to alert them that a submarine threat might exist in their area.

For nearly a decade now, research has been underway on a solution in the form of Continuous Active Sonar (CAS). This is a low level sonar signal that operates like radar, providing a continuous flow of data on what might be down there. Current sonars send out a more powerful signal, but at a low rate (one or more a minute). This annoys underwater creatures, and lawyers representing the critters make it difficult for the navy to even train with this equipment. CAS is based on the growing effectiveness of passive sonar (that just listens, and uses an electronic library of sounds to identify enemy ships). CAS makes it possible to identify increasingly quiet submarines, that depend on their stealth to get close enough to fire a torpedo.

The problem with CAS is that it's been a tricky technology to perfect, although recently there have been some promising tests at sea. If CAS could be perfected and deployed, it would give ships round the clock warning of approaching submarines. With a mature CAS technology, it would also be able to detect approaching torpedoes, and deploy underwater decoys. Eventually, when someone gets CAS to work reliably for sailors to use regularly.



Article Archive

Submarines: Current 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 



Help Keep Us Soaring

We need your help! Our subscription base has slowly been dwindling. We need your help in reversing that trend. We would like to add 20 new subscribers this month.

Each month we count on your subscriptions or contributions. You can support us in the following ways:

  1. Make sure you spread the word about us. Two ways to do that are to like us on Facebook and follow us on Twitter.
  2. Subscribe to our daily newsletter. We’ll send the news to your email box, and you don’t have to come to the site unless you want to read columns or see photos.
  3. You can contribute to the health of StrategyPage. A contribution is not a donation that you can deduct at tax time, but a form of crowdfunding. We store none of your information when you contribute..
Subscribe   Contribute   Close