TOKYO — The Defense Ministry is considering equipping the Maritime Self-Defense Force's submarines with active sonar that sends out sound waves to detect the location of other vessels, The Yomiuri ...

Aselsan trialled its low-frequency towed active sonar system named Düfas aboard the Powhatan-class fleet ocean tug A-590 TCG Inebolu . (SSB) Aselsan has revealed its low-frequency towed active sonar, ...

A scale model of the active array for the miniature version of Düfas on display at UDT 2024. (Janes/Kate Tringham) Turkish manufacturer Aselsan is progressing development of a miniature version of its ...

The Multi-static Active Coherent Enhancements (MAC-E) is an active sonar system composed of source and receiver sonobuoys used by the P-8 during ASW missions. The Naval Air Test and Evaluation ...

WASHINGTON – The Bush administration is strongly opposing international efforts to restrict the Navy’s use of active sonar anywhere in the world, putting it at odds with European allies and several ...

SAN FRANCISCO, California, August 12, 2008 (ENS) - The Navy's use of low frequency active sonar will remain restricted to certain military training areas of the Pacific Ocean, according to an ...

Dear EarthTalk: I understand the Navy is doing sonar testing and training in the oceans and that their activities will likely kill hundreds if not thousands of whales and other marine mammals. What ...

Hawaii—As part of a suit filed in May 2007 by several conservation groups, an injunction was issued Friday by a Hawaii federal district judge over the US Navy's use of active sonar that he recognized ...

Here’s What You Need to Remember: A submarine or surface ship could also use active sonar to emit sound waves that would reflect off another submarine’s hull. In shallow water, this might have ...