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Shark Info 4 / 02   (12-20-2002)

Author

  Intro:

Remote detection sonar threatens the oceans

Shark Info

  Main article:

Remote detection sonar threatens the oceans

Dr. A. J. Godknecht

  Article 1:

CITES Appendix II to finally include whale sharks and basking sharks

Shark Info

  Article 2:

Shark Research Trip to the Gulf of Mexico (Part II)

Dr. A. J. Godknecht, Dr. G. D. Guex

  Fact Sheet:

Cuban dogfish

Shark Info


Remote detection sonar threatens the oceans

Report by Shark Info

LFAS

The sonar system consists of the receiver SURTASS (Surveillance Towed Array Sensor System), and the active LFAS (Low Frequency Active Sonar) transmitter.

© Shark Info

The U.S. Marines and recently NATO have been testing a sonar system which can detect submarines over long distances and which in the future is expected to cover 75% of our oceans. The technology which makes this possible is low frequency active sonar (LFAS) which works at an output sound level of more than 215 decibels. A sound pressure level of 140 decibels, for example from a gunshot, can still be measured at a distance of 380 km away. Such acoustic detonations, even if only brief, are dangerous for living organisms and pose a threat not only to whales and dolphins but also to sharks and bony fish.



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last change: 06-04-2016 10:48